发明名称 |
Sliding member, manufacturing method thereof, mechanical seal ring using sliding member and mechanical seal using mechanical seal ring |
摘要 |
A sliding member having a sliding surface comprising a silicon carbide sintered body having a primary phase comprising mainly silicon carbide, and a subphase having a different composition from the primary phase and containing at least boron, silicon and carbon. The ratio of pores having a roundness of 6 μm or less and a pore diameter of 10 to 60 μm with respect to all pores having a pore diameter of 10 μm or more in the sliding surface is 60% or more. This enables retention of good seal properties even in a long-term continuous use. The subphase in the silicon carbide sintered body is preferably granular crystal phases dotted among a plurality of the primary phases. This provides excellent lubricating liquid holding performance as well as excellent thermal conductivity and excellent thermal shock resistance properties. |
申请公布号 |
US8916488(B2) |
申请公布日期 |
2014.12.23 |
申请号 |
US200712447649 |
申请日期 |
2007.10.30 |
申请人 |
Kyocera Corporation |
发明人 |
Ishimine Yuusaku;Takigawa Kazuaki |
分类号 |
C04B35/565;C04B35/64;C04B38/00;C04B38/06;F16J15/34;C04B111/20;C04B111/00 |
主分类号 |
C04B35/565 |
代理机构 |
Volpe and Koenig, P.C. |
代理人 |
Volpe and Koenig, P.C. |
主权项 |
1. A sliding member comprising:
a primary phase; and a subphase, wherein the primary phase comprises silicon carbide as a main component, and the subphase has a different composition from the primary phase and comprises boron, silicon and carbon; wherein a ratio of spherical pores having a roundness of 6 μm or less and a pore diameter of 10 to 60 μm with respect to all pores having a pore diameter of 10 μm or more in the sliding surface is 75% to 90%; wherein a dispersion density of the spherical pores is 60 pieces/mm2 or more; and wherein a maximum diameter of each pore in the sliding surface is 100 μm or less, wherein the subphase in the silicon carbide sintered body is a granular crystal phase dotted among a plurality of the primary phases, and wherein the aspect ratio of the subphase is 2.5 or less. |
地址 |
Kyoto JP |