发明名称 |
High-toughness zeta-phase carbides |
摘要 |
A ceramic material having a high toughness can include carbon and a transition metal. The transition metal can have an elemental body centered cubic structure at room temperature. A substantial amount of the ceramic can be of a rhombohedralζphase of the transition metal and carbon. These materials can have a high thermal shock resistance, high fracture toughness, and good high temperature performance. A particulate mixture of a carbon source and a transition metal source can be assembled (12) and reacted (14) under high pressure and high temperature. The transition metal source can include a transition metal of a metal which has an elemental BCC structure at room temperature. The particulate mixture carbon to transition metal ratio is chosen so as to achieve a zeta phase carbide and processing is affected in order to retain the zeta phase at a substantial weight percent of the material (i.e. greater than about 5 wt %). The carbide ceramic can be cooled (16) and depressurized (18) to acquire the ceramic material. |
申请公布号 |
US8685874(B2) |
申请公布日期 |
2014.04.01 |
申请号 |
US200913000737 |
申请日期 |
2009.06.23 |
申请人 |
SHETTY DINESH K.;CUTLER RAYMOND A.;HACKETT KENNETH;VERHOEF SHANE;UNIVERSITY OF UTAH RESEARCH FOUNDATION |
发明人 |
SHETTY DINESH K.;CUTLER RAYMOND A.;HACKETT KENNETH;VERHOEF SHANE |
分类号 |
C04B35/52;C04B35/56 |
主分类号 |
C04B35/52 |
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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