Rolling contact bearings, material for bearing surfaces, and process therefor

  • US 4,935,388 A
  • Filed: 04/29/1985
  • Issued: 06/19/1990
  • Est. Priority Date: 04/29/1985
  • Status: Expired due to Term
First Claim
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1. A ceramic material comprising a predominant volume of grains of silicon nitride or silicon oxynitride bonded together by an intergranular phase, said ceramic material having an L10 value of at least four million stress cycles in ASTM test STP 771 under 6.9 gigapascals applied contact stress.

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