Silicon nitride sintered body and process for producing the same
    11.
    发明授权
    Silicon nitride sintered body and process for producing the same 失效
    氮化硅烧结体及其制造方法

    公开(公告)号:US5369065A

    公开(公告)日:1994-11-29

    申请号:US118023

    申请日:1993-09-08

    CPC分类号: C04B35/5935

    摘要: A silicon sintered body comprising a matrix phase consisting of silicon nitride and a grain boundary phase in which the silicon nitride consists of 66 to 99% by volume of .beta.-Si.sub.3 N.sub.4 and/or .beta.'-sialon with the balance being .alpha.-Si.sub.3 N.sub.4 and/or .alpha.'-sialon, the .beta.-Si.sub.3 N.sub.4 and/or .beta.'-sialon consisting of hexagonal rod-like grains having a diameter of 500 nm or less in the minor axis and an aspect ratio 5 to 25, the .alpha.-Si.sub.3 N.sub.4 and/or .alpha.'-sialon consisting of equi-axed grains having an average diameter of 300 nm or less, and titanium compounds are contained within the grains of the matrix phase and in the grain boundary phase. The sintered body is produced by mixing (1) 100 parts by weight of .alpha.-Si.sub.3 N.sub.4 powder, (2) 0.1 to 10 parts by weight of titanium oxide having an average particle size of 100 nm or less and (3) 2 to 15 parts by weight, in total, of specified sintering aids; molding the resultant powder mixture into a green compact; subjecting the green compact to primary sintering and secondary sintering under the prescribed conditions.

    摘要翻译: 一种硅烧结体,包括由氮化硅和晶界相组成的基质相,其中氮化硅由66-99体积%的β-Si 3 N 4和/或β' - 赛隆组成,余量为α-Si 3 N 4和/ 或α' - 塞隆,β-Si 3 N 4和/或β'-Sialon由短轴具有500nm或更小直径的六角棒状晶粒和5至25的长宽比组成,α-Si 3 N 4和/ 或由平均直径为300nm以下的等轴晶粒组成的α'-Sialon,并且钛化合物包含在基质相的晶粒内和晶界相中。 烧结体通过混合(1)100重量份的α-Si 3 N 4粉末,(2)0.1〜10重量份的平均粒径为100nm以下的氧化钛和(3)2〜15重量份 总共为指定的烧结助剂; 将所得粉末混合物成型为生坯; 在规定的条件下对生坯进行一次烧结和二次烧结。

    Silicon nitride sintered body
    12.
    发明授权
    Silicon nitride sintered body 失效
    氮化硅烧结体

    公开(公告)号:US5424256A

    公开(公告)日:1995-06-13

    申请号:US138346

    申请日:1993-10-18

    IPC分类号: C04B35/593 C04B35/599

    CPC分类号: C04B35/5935

    摘要: Silicon nitride sintered bodies consisting of prismatic crystal grains of Si.sub.3 N.sub.4 and/or sialon, equi-axed crystal grains of Si.sub.3 N.sub.4 and/or sialon, a grain boundary phase existing among the prismatic and equi-axed crystal grains and dispersed particles in the grain boundary phase, in which the prismatic crystal grains have an average grain size of 0.3 .mu.m or less in minor axis and an average grain size of 5 .mu.m or less in major axis, the equi-axed crystal grains have an average grain size of 0.5 .mu.m or less and the dispersed particles have an average size of 0.1 .mu.m or less, the volume of the dispersed particles being 0.05% by volume or more based on the total volume of the rest of the sintered body. The silicon nitride sintered bodies have a strength sufficient for use as structural materials of machine parts or members, with a minimized scattering of the strength as well as high reliability, superior productivity and advantageous production cost.

    摘要翻译: 由Si 3 N 4和/或赛隆的棱柱状晶粒构成的氮化硅烧结体,Si 3 N 4等离子晶粒和/或赛隆,棱晶相和等轴晶粒中存在的晶界相和晶界相中的分散粒子 其中棱柱晶粒的短轴平均粒径为0.3μm以下,长轴的平均粒径为5μm以下,等轴晶粒的平均粒径为0.5μm m以下,分散粒子的平均粒径为0.1μm以下,相对于烧结体的其余部分的总体积,分散粒子的体积为0.05体积%以上。 氮化硅烧结体具有足以用作机械部件或部件的结构材料的强度,其强度的极小散射以及高可靠性,优异的生产率和有利的生产成本。

    Wear-resistant slide member and slide device using the same
    14.
    发明申请
    Wear-resistant slide member and slide device using the same 审中-公开
    耐磨滑动构件和使用其的滑动装置

    公开(公告)号:US20060000432A1

    公开(公告)日:2006-01-05

    申请号:US10526000

    申请日:2004-06-30

    IPC分类号: F01L1/26 F01L1/18

    摘要: An object of the present invention is to provide a wear-resistant sliding part with a wear-resistant member to reduce wear of contacting portions of two parts which moves in linkage with each other such as a valve bridge and a rocker arm in a valve train system of a diesel engine, wherein the wear-resistant member is held in a recess of a receiving part securely not to fall off and allowed in the recess to rotate and move in the parallel direction to its bottom surface. Also the wear-resistant member is arranged with at least one of the following: a chamfer provided at the perimeter of bottom surface; the bottom surface with the flatness from 0.05 to 0.20 μm and a convex shape of a raised-up outer side; and at least one of the bottom, side, and top surfaces having surface roughness (Ra) of 0.2 μm or less.

    摘要翻译: 本发明的目的是提供一种具有耐磨构件的耐磨滑动部件,以减少彼此连动地移动的两部分的接触部分的磨损,例如阀桥和气门机构中的摇臂 系统,其中所述耐磨构件被保持在接收部分的凹部中,所述凹部牢固地不会脱落并且允许在所述凹部中旋转并沿着其平行方向移动到其底表面。 此外,耐磨构件设置有以下至少一个:设置在底表面的周边的倒角; 平坦度为0.05〜0.20μm的底面和凸起的外侧的凸形状; 并且具有0.2μm或更小的表面粗糙度(Ra)的底表面,侧表面和顶表面中的至少一个。