Metal treatment – Stock – Chromium – molybdenum – or tungsten base
Patent
1996-08-19
1999-02-02
Wyszomierski, George
Metal treatment
Stock
Chromium, molybdenum, or tungsten base
420429, C22C 2704
Patent
active
058659099
ABSTRACT:
A boron-modified molybdenum silicide material having the composition comprising about 80 to about 90 weight % Mo, about 10 to about 20 weight % Si, and about 0.1 to about 2 weight % B and a multiphase microstructure including Mo.sub.5 Si.sub.3 phase as at least one microstructural component effective to impart good high temperature creep resistance. The boron-modified molybdenum silicide material is fabricated into such products as electrical components, such as resistors and interconnects, that exhibit oxidation resistance to withstand high temperatures in service in air as a result of electrical power dissipation, electrical resistance heating elements that can withstand high temperatures in service in air and other oxygen-bearing atmospheres and can span greater distances than MoSi.sub.2 heating elements due to improved creep resistance, and high temperature structural members and other fabricated components that can withstand high temperatures in service in air or other oxygen-bearing atmospheres while retaining creep resistance associated with Mo.sub.5 Si.sub.3 for structural integrity.
REFERENCES:
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"The Potential For Use of Mo.sub.5 Si.sub.3 In High Temperature Applications" American Ceramic Soc, Annual Meeting, Apr. 26, 1994, Meyer et al.
Akinc Mufit
Meyer Mitchell K.
Iowa State University & Research Foundation, Inc.
Timmer Edward J.
Wyszomierski George
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