Method for pressurelessly sintering zirconium diboride/silicon carbide composite bodies to high densities
US7723247B2 · kind B2 · utility
Inventors
Key dates
| Filing date | May 12, 2008 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | May 12, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/963
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of sintering a ZrB2—SiC composite body at ambient pressures, including blending a first predetermined amount of ZrB2 powder with a second predetermined amount of SiC powder, wherein both powders are characterized by the presence of surface oxide impurities. Next the blended powders are mixed to yield a substantially homogeneous powder mixture and a portion of the substantially homogeneous powder mixture is formed into a green body. The body is fired to a first temperature, wherein substantially all surface oxide impurities are reduced and/or volatilized to substantially eliminate oxides from the green body, and the body is heated to a second temperature and sintered to yield a composite body of at least about 99 percent theoretical density and characterized by SiC whisker-like inclusions distributed substantially evenly in a ZrB2 matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.