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Ultra high purity, dimensionally stable INVAR 36An INVAR 36 material having long-term dimensional stability is produced by sintering a blend of powders of nickel and iron under pressure in an inert atmosphere to form an alloy containing less than 0.01 parts of carbon and less than 0.1 part aggregate and preferably 0.01 part individually of Mn, Si, P, S and Al impurities. The sintered alloy is heat treated and slowly and uniformly cooled to form a material having a coefficient of thermal expansion of less than 1 ppm/C and a temporal stability of less than 1 ppm/year.
Document ID
19960012371
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Sokolowski, Witold M. (Jet Propulsion Lab. California Inst. of Tech., Pasadena, CA., United States)
Lane, Marc S. (Jet Propulsion Lab. California Inst. of Tech., Pasadena, CA., United States)
Hsieh, Cheng H. (Jet Propulsion Lab. California Inst. of Tech., Pasadena, CA., United States)
Odonnell, Timothy P. (Jet Propulsion Lab. California Inst. of Tech., Pasadena, CA., United States)
Date Acquired
August 17, 2013
Publication Date
December 19, 1995
Subject Category
Metallic Materials
Report/Patent Number
Patent Application Number: US-PATENT-APPL-SN-273511
Patent Number: US-PATENT-5,476,633
Patent Number: NASA-CASE-NPO-19358-1-CU
Accession Number
96N18608
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-5,476,633|NASA-CASE-NPO-19358-1-CU
Patent Application
US-PATENT-APPL-SN-273511

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