Production of metal glass in bulk form

• US 20060154084A1
• Filed: 01/10/2005
• Published: 07/13/2006
• Est. Priority Date: 01/10/2005
• Status: Abandoned Application

• Current Assignee: Massachusetts Institute of Technology
• Original Assignee: Massachusetts Institute of Technology
• Inventors: Schuh, Christopher A., Detor, Andrew J.
• Application Number:
  US11/032,680
• Publication Number:
  US 20060154084A1
• Time in Patent Office: Days
• US Class Current: 428/426
• CPC Class Codes: C25D 21/12 Process control or regulation controlling or regulating in general G05
• CPC Class Codes: C25D 21/18 of electrolytes C25D21/22 takes precedence
• CPC Class Codes: C25D 3/66 from melts
• CPC Class Codes: C25D 5/022 using masking means

Abstract

A method for fabricating metal glasses in bulk form uses electrodeposition. Careful control is maintained of: (i) bath chemistry, (ii) deposition temperature; and (iii) electrical plating conditions, such as the current density, for an extended period of time, such as six hours. Composition of electrodeposition liquid is closely controlled, and adjusted when it differs from desired. Monitoring can be active, as by spectrophotometric analysis, or by comparison of time to a calibration table. A dissolving anode can replenish depleted components. Temperature of the liquid is typically maintained within ±2° C. Object composition can be, but is not limited to: Nickel (Ni) and Tungsten (W); Iron (Fe) and Molybdenum (Mo); Iron (Fe) and Tungsten (W); Nickel (Ni) and Molybdenum (Mo); Nickel (Ni) and Phosphorous (P); Nickel (Ni), Tungsten (W) and Boron (B); Iron (Fe), Nickel (Ni) and Carbon (C); Iron (Fe), Chromium (Cr), Phosphorous (P) and Carbon (C); Cobalt (Co) and Tungsten (W); Chromium (Cr) and Phosphorous (P); Copper (Cu) and Silver (Ag); Copper (Cu) and Zinc (Zn); Cobalt (Co) and Zinc (Zn). Metal glass bulk objects can be electroformed from elements that can not be cast, either due to excessively high melting temperatures, or less than perfect miscibility. Metal glass objects can be unitary, or may include a core of another material. Electrodeposition liquid may be aqueous, alcohol, hydrogen chloride, or metal salt. Useful metal glass objects include but are not limited to at least a portion of: a golf club head; a racquet head, for instance a tennis or squash racquet head; a snowboard; a ski edge; knife blade cutting edge; and many different types of springs.

Claims

1. A method for fabricating a metal glass object having bulk dimensions, comprising the steps of:

a. providing an apparatus comprising an anode and a cathode, coupled to each other through a power supply;

b. providing, in contact with the anode and the cathode, a liquid comprising at least two ions, at least one of which is a metallic ion, the liquid being a specific composition that promotes formation of a metal glass body;

c. providing an electric potential between the cathode and the anode such that at least two elements plate out of the liquid at the cathode, at least one of which elements is a metal, to form metal glass at the cathode; and

d. maintaining conditions sufficiently regular for a sufficiently long time so that the elements continue to plate at the cathode as a metal glass until a body is formed that has at least bulk size in three orthogonal directions.

2. The method of claim 1, the object having a useful shaped geometry and the cathode being of metal and of a shape suitable as a progenitor shape for a finished object having the useful shaped geometry, further wherein the step of maintaining conditions comprises maintaining conditions sufficiently regular for a sufficiently long time so that the elements continue to plate at the cathode as a metal glass until a body is formed that has a metal glass covering over the cathode, which covering is at least bulk size in three orthogonal directions and which body has the useful shaped geometry.

3. The method of claim 2, further comprising the step of removing at least a portion of the cathode after a body is formed that has at least bulk size in three orthogonal directions.

4. The method of claim 1, the step of providing an apparatus further comprising providing a vessel, and the step of providing a liquid comprising providing a liquid in the vessel, in which the anode and the cathode also reside.

5. The method of claim 1, the liquid comprising an aqueous solution.

6. The method of claim 1, the liquid comprising at least one molten salt.

7. The method of claim 1, the liquid comprising at least one metal salt.

8. The method of claim 1, the liquid comprising an alcohol.

9. The method of claim 1, the liquid comprising a HCl (hydrogen chloride).

10. The method of claim 1, the step of maintaining conditions comprising maintaining the composition of the liquid sufficiently constant.

11. The method of claim 1, the step of maintaining conditions comprising maintaining the temperature of the liquid sufficiently constant.

12. The method of claim 1, the step of maintaining conditions comprising maintaining the electrical conditions sufficiently regular.

13. The method of claim 12, said step of maintaining the electrical conditions comprising maintaining the current density with a regular amplitude pulse.

14. The method of claim 1, the step of maintaining conditions comprising avoiding conditions that prevent formation of a uniform density bulk form.

15. The method of claim 14, the step of avoiding conditions comprising avoiding conditions that give rise to stresses that promote cracking.

16. The method of claim 1, the step of maintaining conditions comprising avoiding conditions that promote voids.

17. The method of claim 1, the step of maintaining conditions comprising avoiding conditions that promote inclusions.

18. The method of claim 1, the plated elements comprising Nickel (Ni) and Tungsten (W).

19. The method of claim 18, the anode comprising Platinum (Pt).

20. The method of claim 19, the cathode comprising copper (Cu).

21. The method of claim 1, the step of maintaining comprising actively maintaining liquid composition by measuring liquid composition regularly and replenishing any material that has been depleted.

22. The method of claim 1, the step of maintaining comprising measuring time, and comparing the measured time to a time entry on a previously prepared calibration table that relates time to liquid composition, thereby measuring liquid composition, and replenishing any material that has been depleted.

23. The method of claim 1, the step of maintaining comprising providing, in the liquid, a soluble anode that dissolves into the liquid at a rate that maintains the liquid composition.

24. The method of claim 11, the step of maintaining the temperature comprising providing a digitally controlled oil bath in thermal communication with the liquid and using the oil bath to control the temperature of the liquid.

25. The method of claim 11, the step of maintaining the temperature comprising maintaining the temperature within 2 degrees Centigrade above and below a temperature set point.

26. The method of claim 1, the step of maintaining comprising maintaining conditions sufficiently regular for at least six hours.

27. The method of claim 5, the step of providing an aqueous solution comprising providing a liquid consisting essentially of a solution of exactly two metal ions.

28. The method of claim 1, the step of providing a liquid comprising providing a liquid consisting essentially of a solution of a specific composition of exactly one metal ion, and phosphorous (P).

29. The method of claim 1, the step of providing a liquid comprising providing a liquid consisting essentially of a solution of a specific composition of exactly one metal ion, and boron (B).

30. The method of claim 6, the step of providing a liquid comprising providing a liquid consisting essentially of a solution of a specific composition of exactly two metal ions.

31. The method of claim 8, the step of providing a liquid comprising providing a liquid consisting essentially of a solution of a specific composition of exactly two metal ions.

32. The method of claim 9, the step of providing a liquid comprising providing a liquid consisting essentially of a solution of a specific composition of exactly two metal ions.

33. The method of claim 27, the two ions comprising:

Iron (Fe) and Molybdenum (Mo).

34. The method of claim 27, the two ions comprising Iron (Fe) and Tungsten (W).

35. The method of claim 27, the two ions comprising Nickel (Ni) and Molybdenum (Mo).

36. The method of claim 1, the two elements comprising Nickel (Ni) and Phosphorous (P).

37. The method of claim 1, the elements comprising Nickel (Ni), Tungsten (W) and Boron (B).

38. The method of claim 1, the step of providing a liquid comprising providing a liquid consisting essentially of a solution of exactly three ions.

39. The method of claim 38, the three ions comprising Iron (Fe), Nickel (Ni) and Carbon (C).

40. The method of claim 1, the step of providing a liquid solution comprising providing a liquid consisting essentially of a solution of exactly the four ions Iron (Fe), Chromium (Cr), Phosphorous (P) and Carbon (C).

41. The method of claim 38, the three ions comprising Cobalt (Co), Nickel (Ni) and Phosphorous (P).

42. The method of claim 27, the two ions comprising Cobalt (Co) and Tungsten (W).

43. The method of claim 1, the two elements comprising Chromium (Cr) and Phosphorous (P).

44. The method of claim 27, the two ions comprising Copper (Cu) and Silver (Ag).

45. The method of claim 27, the two ions comprising Copper (Cu) and Zinc (Zn).

46. The method of claim 30, the two ions comprising Aluminum (Al) and Manganese (Mn).

47. The method of claim 30, the two ions comprising Cobalt (Co) and Zinc (Zn).

48. The method of claim 1, further comprising, before the step of providing an electric potential, the step of dressing a portion of the cathode with a masking material to which metal will not plate, such that said step of providing an electric potential between the cathode and the anode such that at least two elements plate out of the liquid at the cathode, comprises providing an electric potential between the cathode and the anode such that at least two elements plate out of the liquid at regions of the cathode that are not dressed with said mask material.

49. The method of claim 48, further comprising, after the step of providing an electric potential between the cathode and the anode such that at least two elements plate out of the liquid at the cathode, at least one of which elements is a metal, to form metal glass at the cathode, the step of dressing a second portion of the cathode with a masking material to which metal will not plate, such that said step of providing an electric potential between the cathode and the anode such that at least two elements plate out of the liquid at the cathode, comprises providing an electric potential between the cathode and the anode such that at least two elements plate out of the liquid at additional regions of the cathode that are not dressed with said mask material that had been applied with the second step of dressing.

50. The method of claim 1, further comprising the step of removing at least a portion of the cathode after a body is formed that has at least bulk size in three orthogonal directions.

51. The method of claim 50, said step of removing a portion of the cathode comprising removing using a mechanical process.

52. The method of claim 50, said step of removing a portion of the cathode comprising chemically removing the portion of the cathode.

53. The method of claim 2, the useful shaped geometry being the shape of at least a portion of a golf club head.

54. The method of claim 2, the useful shaped geometry being the shape of at least a portion of a racquet head.

55. The method of claim 2, the useful shaped geometry being the shape of at least a portion of a tennis racquet head.

56. The method of claim 2, the useful shaped geometry being the shape of at least a portion of a snowboard.

57. The method of claim 2, the useful shaped geometry being the shape of at least a portion of a ski edge.

58. The method of claim 2, the useful shaped geometry being the shape of at least a portion of a knife blade cutting edge.

59. The method of claim 2, the useful shaped geometry being the shape of at least a portion of a spring.

60. An object comprising a metal glass portion having dimensions of at least one mm in each of three orthogonal directions, said metal glass portion having been formed by a process comprising the steps of:

a. providing an apparatus comprising an anode and a cathode, coupled to each other through a power supply;

b. providing in contact with the anode and the cathode, a liquid solution comprising at least two ions, at least one of which is a metallic ion, the solution being a specific composition that promotes formation of a metal glass body;

c. providing an electric potential between the cathode and the anode such that at least two elements plate out of the liquid at the cathode, at least one of which elements is a metal, to form metal glass at the cathode; and

d. maintaining conditions sufficiently regular for a sufficiently long time so that the elements continue to plate at the cathode as a metal glass until a body is formed that has at least bulk size in three orthogonal directions.

61. The object of claim 60, the object having a useful shaped geometry the metal glass portion having been formed by a process, wherein the step of providing a cathode comprises providing a cathode of metal and of a shape suitable as a progenitor shape for a finished object having the useful shaped geometry, further wherein the step of maintaining conditions comprises maintaining conditions sufficiently regular for a sufficiently long time so that the elements continue to plate at the cathode as a metal glass until a body is formed that has a metal glass covering over the cathode, which covering is at least bulk size in three orthogonal directions and which body has the useful shaped geometry.

62. The object of claim 60, the metal glass portion having been formed by a process whereby, the step of providing an apparatus further comprises providing a vessel, and the step of providing a liquid comprises providing a liquid in the vessel, in which the anode and the cathode also reside.

63. The object of claim 60, said metal glass portion having been formed by a process further wherein the liquid composition comprises an aqueous solution.

64. The object of claim 60, the two ions comprising:

Iron (Fe) and Molybdenum (Mo).

65. The object of claim 60, the two ions comprising Iron (Fe) and Tungsten (W).

66. The object of claim 60, the two ions comprising Nickel (Ni) and Molybdenum (Mo).

67. The object of claim 60, the two ions comprising Nickel (Ni) and tungsten (W).

68. The object of claim 60, the two ions comprising Cobalt (Co) and Molybdenum (Mo).

69. The object of claim 60, the two ions comprising Cobalt (Co) and tungsten (W).

70. The object of claim 60, the two ions comprising iron (Fe) and Phosphorous (P).

71. The object of claim 60, the two ions comprising Nickel (Ni) and Phosphorous (P).

72. The object of claim 60, the two ions comprising Cobalt (Co) and Phosphorous (P).

73. The object of claim 60, the metal glass portion having been formed by a process whereby the step of providing a liquid solution comprises providing a liquid consisting essentially of a solution of exactly three ions.

74. The object of claim 73, the three ions comprising Nickel (Ni), Tungsten (W) and Boron (B).

75. The object of claim 74, the three ions comprising Iron (Fe), Nickel (Ni) and Carbon (C).

76. The object of claim 74, the three ions comprising Cobalt (Co), Nickel (Ni) and Phosphorous (P).

77. The object of claim 60, the two ions comprising Cobalt (Co) and Tungsten (W).

78. The object of claim 60, the two ions comprising Cobalt (Co) and Molybdenum (Mo).

79. The object of claim 60, the metal glass portion having been formed by a process where the step of maintaining comprises actively maintaining liquid composition by measuring liquid composition regularly and replenishing any material that has been depleted.

80. The object of claim 60, the metal glass portion having been formed by a process where the step of maintaining comprises measuring time, and comparing the measured time to a time entry on a previously prepared calibration table that relates time to liquid composition, thereby measuring liquid composition, and replenishing any material that has been depleted.

81. The object of claim 60, the metal glass portion having been formed by a process where the step of maintaining comprises providing, in the liquid, a soluble anode that dissolves into the liquid at a rate that maintains the liquid composition.

82. The object of claim 60, the metal glass portion having been formed by a process where the step of maintaining comprises maintaining conditions sufficiently regular for at least six hours.

83. The object of claim 61, the useful shaped geometry being the shape of at least a portion of a golf club head.

84. The method of claim 61, the useful shaped geometry being the shape of at least a portion of a racquet head.

85. The method of claim 61, the useful shaped geometry being the shape of at least a portion of a tennis racquet head.

86. The method of claim 61, the useful shaped geometry being the shape of at least a portion of a snowboard.

87. The method of claim 61, the useful shaped geometry being the shape of at least a portion of a ski edge.

88. The method of claim 61, the useful shaped geometry being the shape of at least a portion of a knife blade cutting edge.

89. The method of claim 61, the useful shaped geometry being the shape of at least a portion of a spring.

90. An object having an internal core region and a metal glass outer portion having bulk dimensions and a useful shaped geometry, said object having been formed by a process comprising the steps of:

a. providing an apparatus comprising an anode and a cathode, coupled to each other through a power supply, the cathode being of metal and being of a shape suitable as a progenitor shape for a finished object having the useful shaped geometry;

b. providing, in contact with the anode and the cathode, a liquid comprising a solution having at least two ions, at least one of which is a metallic ion, the composition being a specific composition that promotes formation of a metal glass body;

c. providing an electric potential between the cathode and the anode such that at least two elements plate out of the liquid at the cathode, at least one of which elements is a metal, to form metal glass at the cathode; and

d. maintaining conditions sufficiently regular for a sufficiently long time so that the elements continue to plate at the cathode as a metal glass until a body is formed that has a metal glass covering over the cathode, which covering is at least bulk size in three orthogonal directions and which body has the useful shaped geometry.

91. The object of claim 90, said process by which the object is formed further comprising the step of removing at least a portion of the cathode after a body is formed that has at least bulk size in three orthogonal directions.

92. An object having an interior region and a metal glass outer portion having bulk dimensions and a useful shaped geometry, said object comprising:

a. an interior region of a shape suitable as an electroforming progenitor shape for a finished object having the useful shaped geometry; and

b. adjacent at least one surface of said interior region, an electroformed metal glass body comprising at least two elements, at least one of which is a metal, that is at least bulk size in three orthogonal directions and which body has the useful shaped geometry.

93. The object of claim 92, further comprising, at said interior region, a metal core comprising a metal capable of acting as an electroforming cathode in process in which the at least two elements are plated from a liquid at such a metal cathode.

94. The object of claim 92, the two elements comprising:

Iron (Fe) and Molybdenum (Mo).

95. The object of claim 92, the two elements comprising Iron (Fe) and Tungsten (W).

96. The object of claim 92, the two elements comprising Nickel (Ni) and Molybdenum (Mo).

97. The object of claim 92, the two elements comprising Nickel (Ni) and tungsten (W).

98. The object of claim 92, the two elements comprising Cobalt (Co) and Molybdenum (Mo).

99. The object of claim 92, the two elements comprising Cobalt (Co) and tungsten (W).

100. The object of claim 92, the two elements comprising iron (Fe) and Phosphorous (P).

101. The object of claim 92, the two elements comprising Nickel (Ni) and Phosphorous (P).

102. The object of claim 92, the two elements comprising cobalt (Co) and Phosphorous (P).

103. The object of claim 92, the metal glass portion consisting essentially of exactly three elements.

104. The object of claim 103, the three elements comprising Nickel (Ni), Tungsten (W) and Boron (B).

105. The object of claim 104, the three elements comprising Iron (Fe), Nickel (Ni) and Carbon (C).

106. The object of claim 103, the three elements comprising Cobalt (Co), Nickel (Ni) and Phosphorous (P).

107. The object of claim 92, the two elements comprising Cobalt (Co) and Tungsten (W).

108. The object of claim 92, said metal glass portion having a useful shaped geometry.

109. The object of claim 108, the useful shaped geometry being the shape of at least a portion of a golf club head.

110. The object of claim 108, the useful shaped geometry being the shape of at least a portion of a racquet head.

111. The object of claim 108, the useful shaped geometry being the shape of at least a portion of a tennis racquet head.

112. The object of claim 108, the useful shaped geometry being the shape of at least a portion of a snowboard.

113. The object of claim 108, the useful shaped geometry being the shape of at least a portion of a ski edge.

114. The object of claim 108, the useful shaped geometry being the shape of at least a portion of a knife blade cutting edge.

115. The object of claim 108, the useful shaped geometry being the shape of at least a portion of a spring.