发明名称 |
ALPHA-BETA SIALON BALLISTIC ARMOR CERAMIC AND METHOD FOR MAKING THE SAME |
摘要 |
A SiAlON armor ceramic made from a starting powder mixture including silicon nitride powder. The armor ceramic includes a ceramic body that has between about 64 weight percent and about 90 weight percent alpha SiAlON phase that contains an alpha SiAlON-bound rare earth element. The ceramic body also has between about 5 weight percent and about 35 weight percent of a beta SiAlON phase of the formula Si6−zAlzOzN8−z wherein the value of “z” ranges between about 0.10 and about 0.35. The alpha SiAlON-bound rare earth element in the alpha SiAlON phase is present as a result of the starting powder mixture that contains between about 1 weight percent and about 7 weight percent of an oxide of the alpha SiAlON-bound rare earth element. The ceramic body has a fracture toughness (KIC) greater than about 6.00 MPa·m1/2 and a Vickers hardness (HVN) equal to greater than about 19.3 GPa. |
申请公布号 |
US2012190531(A1) |
申请公布日期 |
2012.07.26 |
申请号 |
US20100652876 |
申请日期 |
2010.01.06 |
申请人 |
YECKLEY RUSSELL L.;KENNAMETAL INC. |
发明人 |
YECKLEY RUSSELL L. |
分类号 |
C04B35/599;B29C43/58 |
主分类号 |
C04B35/599 |
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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