发明名称 |
DENSE, SHAPED ARTICLES CONSTRUCTED OF A REFRACTORY MATERIAL AND METHODS OF PREPARING SUCH ARTICLES |
摘要 |
<p>The invention provides a method of forming a dense, shaped article, such as a crucible, formed of a refractory material, the method comprising the steps of placing a refractory material having a melting point of at least about 2900°C in a mold configured to form the powder into an approximation of the desired shape. The mold containing the powder is treated at a temperature and pressure sufficient to form a shape-sustaining molded powder that conforms to the shape of the mold, wherein the treating step involves sintering or isostatic pressing. The shape-sustaining molded powder can be machined into the final desired shape and then sintered at a temperature and for a time sufficient to produce a dense, shaped article having a density of greater than about 90% and very low open porosity. Preferred refractory materials include tantalum carbide and niobium carbide.</p> |
申请公布号 |
WO2006108089(A1) |
申请公布日期 |
2006.10.12 |
申请号 |
WO2006US12783 |
申请日期 |
2006.04.05 |
申请人 |
NORTH CAROLINA STATE UNIVERSITY;SCHLESSER, RAOUL;DALMAU, RAFAEL;NOVESKI, VLADIMIR;SITAR, ZLATKO |
发明人 |
SCHLESSER, RAOUL;DALMAU, RAFAEL;NOVESKI, VLADIMIR;SITAR, ZLATKO |
分类号 |
C04B35/56;C30B23/00 |
主分类号 |
C04B35/56 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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