Abrasive wear behavior of MoSi[sub 2]-Nb composites

Journal Article · Mon Aug 15 04:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90021-3· OSTI ID:7243615

Hawk, J A; Alman, D E ^[1]; Stoloff, N S ^[2]

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1. Bureau of Mines, Albany, OR (United States). Albany Research Center
2. Rensselaer Polytechnic Inst., Troy, NY (United States). Materials Engineering Dept.

Previous research at the US Bureau of Mines has shown monolithic MoSi[sub 2] to be extremely wear resistant in a severe two-body abrasive environment. MoSi[sub 2] is attractive as a wear-resistant material because of its high hardness, high elastic modulus, low density, and excellent resistance to elevated temperature oxidation and hot corrosion. As with most intermetallic compounds, the low temperature fracture toughness is poor; however, reinforcing MoSi[sub 2] with SiC or Nb, for instance, has resulted in improved fracture toughness. It is also known that the wear rate of many materials can be reduced by a factor of up to ten by the introduction of a suitable reinforcement phase. While soft ductile phases have been effective in improving the fracture toughness of brittle matrices, it is intuitive that the addition of these phases should have a negative impact on wear resistance, i.e., the softer phase will wear at an accelerated rate. This study has been undertaken in order to make a preliminary assessment of the effect of adding a ductile reinforcement (Nb) on the abrasive wear resistance of MoSi[sub 2]. The wear behavior of the MoSi[sub 2]-Nb composites produced for this study are compared with the behavior of monolithic MoSi[sub 2], Nb, aluminides, and ceramics.

• OSTI ID: 7243615
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:4; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALLOYS
COMPARATIVE EVALUATIONS
COMPOSITE MATERIALS
DATA
ELEMENTS
EVALUATION
EXPERIMENTAL DATA
FIBERS
FRACTURE PROPERTIES
INFORMATION
MATERIALS
MECHANICAL PROPERTIES
METALS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NIOBIUM
NUMERICAL DATA
SILICON ALLOYS
TRANSITION ELEMENTS
WEAR