P/M Materials for Wear Applications
Wear resistant materials usually consist of either very hard homogeneous single phase materials (e.g., ceramics like Al2O3, SiC, etc.) or heterogenous materials (e.g., white cast irons, composites or cermets, or composite-type materials), typically with a hard reinforcing phase dispersed in a softer matrix. In both instances, the result is the same, less penetration of the abrasive into the surface of the material being worn. Composite type materials can be produced using either a melting/solidification scheme or through powder metallurgy (P/M) techniques. In either case the result is the same, a microstructure that consists of a high volume fraction of hard, usually brittle, second phase particles in a softer matrix. However, P/M can be used to create a wider range of these materials than can melting/solidification, because in P/M processing, the desired phase does not have to be precipitated during solidification. Thus, more materials can be produced with higher volume fractions of reinforcing phases. Obviously, other factors like reinforcement size, matrix-particle interfacial strength, plastic accommodation of the matrix, etc. become important in the wear behavior of these materials. Various categories of P/M wear resistant materials will be discussed, and their wear behavior will be compared against traditional wear resistant cast materials like white cast iron and tool steels.
- Research Organization:
- Albany Research Center (ARC), Albany, OR (United States)
- Sponsoring Organization:
- USDOE - Office of Fossil Energy (FE)
- OSTI ID:
- 900345
- Report Number(s):
- DOE/ARC-2001-130; TRN: US200711%%531
- Resource Relation:
- Conference: 2000 TMS (The Minerals, Metals & Materials Society) Annual Fall Meeting, St. Louis, MO, Oct. 8-12, 2000
- Country of Publication:
- United States
- Language:
- English
Similar Records
Wear resistant, powder processed in-situ iron-matrix TiC composites
Abrasion resistance of in situ Fe-TiC composites