Method of bonding two bodies together

• US 3,921,885 A
• Filed: 06/28/1973
• Issued: 11/25/1975
• Est. Priority Date: 06/28/1973
• Status: Expired due to Term

• Current Assignee: Joseph Dale Knox
• Original Assignee: Joseph Dale Knox
• Inventors: Knox, Joseph Dale
• Primary Examiner(s): Custer, Jr., Granville Y.
• Assistant Examiner(s): Davie, James W.
• Application Number:
  US05/374,396
• Time in Patent Office: 880 Days
• Field of Search: 29/472.7,472.9,473.1,594,470.1,488,498,501,502,504 228/115,116,121,208
• US Class Current: 228/116
• CPC Class Codes: B23K 20/16 with interposition of special material to facilitate connection of the parts, e.g. material for absorbing or producing gas
• CPC Class Codes: B23K 35/001 Interlayers, transition pieces for metallurgical bonding of workpieces
• CPC Class Codes: H10N 30/073 by fusion of metals or by adhesives

Abstract

A surface of each of the bodies is coated with a layer of gold. The bodies are placed in a chamber which is evacuated to a pressure of at least 10 3 torr. While maintaining the chamber and its contents at room temperature, the gold layers are brought into contacting relation and a pressure of between 800 psi and 2500 psi is applied to the bodies to bond the gold layers together.

Claims

1. A METHOD OF BONDING TOGETHER TWO BODIES OF AN ACOUSTIC MATERIAL COMPRISING THE STEPS OF APPLYING A LAYER OF GOLD ON A SURFACE OF EACH OF THE BODIES, PLACING THE BODIES IN A CHAMBER, EVACUATING SAID CHAMBER TO A PRESSURE OF AT LEAST 10**-3 TORR, BRINGING THE GOLD LAYERS INTO CONTACTING RELATION, AND WITH THE BODIES BEING AT ROOM TEMPERATURE APPLYING A PRESSURE OF 800 TO 1600 PSI TO SAID BODIES FOR A TIME SUFFICIENT TO BOND THE GOLD ALYERS TOGETHER.

2. A method in accordance with claim 1 including providing a layer of aluminum over each of said surfaces of the bodies and coating the gold layer on the aluminum layer.

3. The method in accordance with claim 2 including coating each of said surfaces of the bodies with a metal adhesive layer selected from the group consisting of chromium, molybdenum and titanium and coating the aluminum layers on the adhesive layers.