Abstract
Functionally graded composite materials (FGM composites) with a gradient of matrix phase can offer improved properties. Liquid-phase sintering is one of the approaches for making such materials with a desired gradient of the matrix phase by controlling the redistribution of the liquid phase during sintering. The present study on cemented carbide, WC-Co, demonstrates that the composition of the liquid phase (cobalt phase) is one of the key factors controlling the liquid redistribution. The dependence of the final gradient of the cobalt phase after sintering on its own chemical composition profile is quantitatively established, enabling the design and manufacture of WC-Co with a cobalt-phase-volume gradient via predesigned gradients of carbon content in the system.
| Original language | English |
|---|---|
| Pages (from-to) | 1995-2006 |
| Number of pages | 12 |
| Journal | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Volume | 40 |
| Issue number | 8 |
| DOIs | |
| State | Published - 2009 |
Funding
The authors acknowledge the financial support for this research provided by multiple sources, including the United States Department of Energy with the Grant Number DE-FC36-04GO14041, the State of Utah Centers of Excellence Program, and Kennametal, Inc., at various times in the past six years.
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