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Refractory amorphous metallic (W/0.6/ Re/0.4/)76B24 coatings on steel substratesRefractory metallic coatings of (W/0.6/ Re/0.4/)76B24 (WReB) have been deposited onto glass, quartz, and heat-treated AISI 52100 bearing steel substrates by dc magnetron sputtering. As-deposited WReB films are amorphous, as shown by their diffuse X-ray diffraction patterns; chemically homogeneous, according to secondary ion mass spectrometry (SIMS) analysis; and they exhibit a very high (approximately 1000 C) crystallization temperature. Adhesion strength of these coatings on heat-treated AISI 52100 steel is in excess of approximately 20,000 psi and they possess high microhardness (approximately 2400 HV50). Unlubricated wear resistance of such hard and adherent amorphous metallic coatings on AISI 52100 steel is studied using the pin-on-disc method under various loading conditions. Amorphous metallic WReB coatings, about 4 microns thick, exhibit an improvement of more than two and a half orders of magnitude in the unlubricated wear resistance over that of the uncoated AISI 52100 steel.
Document ID
19860030045
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Thakoor, A. P.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lamb, J. L.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Khanna, S. K.
(California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Mehra, M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Johnson, W. L.
(California Institute of Technology Pasadena, United States)
Date Acquired
August 12, 2013
Publication Date
November 1, 1985
Publication Information
Publication: Journal of Applied Physics
Volume: 58
ISSN: 0021-8979
Subject Category
Metallic Materials
Accession Number
86A14783
Distribution Limits
Public
Copyright
Other

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