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    • 11. 发明授权
    • Method of machining silicon nitride ceramics and silicon nitride
ceramics products
    • 氮化硅陶瓷和氮化硅陶瓷制品的加工方法
    • US5297365A
    • 1994-03-29
    • US921255
    • 1992-07-29
    • Takao NishiokaKenji MatsunumaAkira Yamakawa
    • Takao NishiokaKenji MatsunumaAkira Yamakawa
    • B24B1/00B24B7/22B24B19/22B24D3/00C04B35/584
    • B24B19/22B24B1/00
    • An industrially feasible method of grinding silicon nitride ceramics, is disclosed and provides a sufficiently smooth surface. Namely, the surface has a maximum height-roughness Rmax of 0.1 microns or less and a ten-point mean roughness Rz of 0.05 microns. Further, with this method, surface damage can be repaired while grinding. The vertical cutting feed rate of a grinding wheel into a workpiece should be within the range of 0.005-0.1 micron for each rotation of the working surface of the wheel and change linearly or stepwise. The cutting speed of the grinding wheel in a horizontal (rotational) direction should be within the range of 25 to 75 m/sec. With this arrangement, the contact pressure and grinding heat that is generated between the workpiece and the hard abrasive grains during grinding are combined. In other words, mechanical and thermal actions are combined.
    • 公开了一种工业上可行的研磨氮化硅陶瓷的方法,并提供了足够光滑的表面。 即,表面的最大高度粗糙度Rmax为0.1微米以下,十点平均粗糙度Rz为0.05微米。 此外,通过该方法,可以在磨削时修复表面损伤。 砂轮进入工件的垂直切削进给速率应在车轮工作表面的每次旋转时在0.005-0.1微米的范围内,并且线性或逐步改变。 砂轮在水平(旋转)方向上的切割速度应在25至75米/秒的范围内。 通过这种布置,在磨削期间在工件和硬磨粒之间产生的接触压力和磨削热被组合。 换句话说,组合了机械和热动作。
    • 14. 发明授权
    • Diamond-coated sliding part
    • 金刚石涂层滑动部件
    • US06534170B2
    • 2003-03-18
    • US09725854
    • 2000-11-30
    • Yasushi MochidaTakao Nishioka
    • Yasushi MochidaTakao Nishioka
    • F01L116
    • F01L1/14F01L1/143F01L3/04Y10T428/24355Y10T428/24628Y10T428/265Y10T428/30
    • Provided is a diamond-coated sliding part that is light, has excellent abrasion resistance, that prevents abrasion of the material of an opposite member, and that is effective in reducing power loss. This sliding part is especially useful as an adjusting shim for the valve train mechanism of an internal combustion engine such as an automobile engine in which the base material is silicon nitride or sialon and this base material surface is coated with a diamond coating layer. By performing finish processing on only a small part of peaks of diamond particles protruding from the surface of the diamond coating layer to reduce the height of the protrusions, or by controlling film forming conditions, etc., the profile bearing length ratio (tp) at a cutting level of 0.1 &mgr;m for the sliding surface of the diamond coating layer is made 60% or greater.
    • 提供了一种轻质的金刚石涂层滑动部件,具有优异的耐磨性,防止相对构件的材料磨损,并且有效地降低功率损耗。 该滑动部件作为用于内燃机例如汽车发动机的气门机构的调节垫片是特别有用的,其中基材是氮化硅或赛隆,并且该基材表面涂覆有金刚石涂层。 通过对仅从金刚石涂层的表面突出的金刚石颗粒的峰的一小部分进行精加工,以减少突起的高度,或者通过控制成膜条件等,对轮廓轴承长度比(tp) 金刚石涂层的滑动面的切割水平为0.1μm,为60%以上。
    • 17. 发明授权
    • Silicon nitride ceramic and process for forming the same
    • 氮化硅陶瓷及其形成方法
    • US5767026A
    • 1998-06-16
    • US633797
    • 1996-04-10
    • Naoki KondohFumihiro WakaiYoshihiro ObataAkira YamakawaTakao NishiokaMasashi Yoshimura
    • Naoki KondohFumihiro WakaiYoshihiro ObataAkira YamakawaTakao NishiokaMasashi Yoshimura
    • B28B1/00C04B35/584C04B35/593C04B35/597C04B35/599C04B35/626
    • C04B35/593C04B35/597
    • There are provided a process for forming a silicon nitride sintered body, encompassing a sialon sintered body, by making much of the superplasticity of the sintered body intact as a simple material without formation thereof into a composite material, and a formed sintered body produced by the foregoing process. A silicon nitride sintered body (encompassing a sialon sintered body) having a relative density of at least 95% and a linear density of 120 to 250 in terms of the number of grains per 50 .mu.m in length in a two-dimensional cross section of the sintered body is formed through plastic deformation thereof at a strain rate of at most 10.sup.-1 /sec under a tensile or compressive pressure at a temperature of 1,300 to 1,700.degree. C. The formed sintered body has a degree of orientation of 5 to 80% as examined according to a method specified by Saltykov, a linear density of 80 to 200, and excellent mechanical properties especially at ordinary temperatures.
    • PCT No.PCT / JP95 / 02026 Sec。 371日期:1996年4月10日 102(e)日期1996年4月10日PCT提交1995年10月4日PCT公布。 公开号WO96 / 10546 日本特开1996年4月11日提供了一种形成氮化硅烧结体的方法,其包括塞隆烧结体,通过使烧结体的大部分超塑性作为简单材料而不被形成为复合材料而形成,并形成 通过上述方法制造的烧结体。 一种氮化硅烧结体(包括赛隆烧结体),其相对密度至少为95%,线密度为120-250,以二维截面为单位长度的每50微米的颗粒数 该烧结体通过在1300〜1700℃的拉伸或压缩压力下以至多10-1 /秒的应变速率的塑性变形形成。所形成的烧结体的取向度为5〜80 %,根据Saltykov规定的方法,线密度为80〜200,特别是在常温下,具有优异的机械性能。
    • 18. 发明授权
    • Facility for grinding silicon nitride ceramic workpiece
    • 研磨氮化硅陶瓷工件的设备
    • US5605494A
    • 1997-02-25
    • US423726
    • 1995-04-18
    • Takao NishiokaKenji MatsunumaAkira Yamakawa
    • Takao NishiokaKenji MatsunumaAkira Yamakawa
    • B24B1/00B24B7/22B24B19/22B24D3/00C04B35/584
    • B24B19/22B24B1/00
    • An industrially feasible method of grinding silicon nitride ceramics is disclosed and provides a sufficiently smooth surface. Namely, the surface has a maximum height-roughness Rmax of 0.1 microns or less and a ten-point mean roughness Rz of 0.05 micron. Further, with this method, surface damage can be repaired while grinding. The vertical cutting feed rate of a grinding wheel into a workpiece should be within the range of 0.005-0.1 micron for each rotation of the working surface of the wheel and change linearly or stepwise. The cutting speed of the grinding wheel in a horizontal (rotational) direction should be within the range of 25 to 75 m/sec. With this arrangement, the contact pressure and grinding heat that is generated between the workpiece and the hard abrasive grains during grinding are combined. In other words, mechanical and thermal actions are combined.
    • 公开了一种工业上可行的研磨氮化硅陶瓷的方法,并提供了足够光滑的表面。 即,表面的最大高度粗糙度Rmax为0.1微米以下,十点平均粗糙度Rz为0.05微米。 此外,通过该方法,可以在磨削时修复表面损伤。 研磨轮进入工件的垂直切削进给速率应在车轮工作表面的每次旋转时在0.005-0.1微米的范围内,并且线性或逐步改变。 砂轮在水平(旋转)方向上的切割速度应在25至75米/秒的范围内。 通过这种布置,在磨削期间在工件和硬磨粒之间产生的接触压力和磨削热被组合。 换句话说,组合了机械和热动作。
    • 19. 发明授权
    • Method of machining silicon nitride ceramics and silicon nitride
ceramics products
    • 氮化硅陶瓷和氮化硅陶瓷制品的加工方法
    • US5584745A
    • 1996-12-17
    • US162302
    • 1993-12-06
    • Takao NishiokaKenji MatsunumaAkira Yamakawa
    • Takao NishiokaKenji MatsunumaAkira Yamakawa
    • B24B1/00B24B7/22B24B19/22B24D3/00C04B35/584
    • B24B19/22B24B1/00
    • An industrially feasible method of grinding silicon nitride ceramics is disclosed and provides a sufficiently smooth surface. Namely, the surface has a maximum height-roughness Rmax of 0.1 microns or less and a ten-point mean roughness Rz of 0.05 microns. Further, with this method, surface damage can be repaired while grinding. The vertical cutting feed rate of a grinding wheel into a work piece should be within the range of 0.005-0.1 micron for each rotation of the working surface of the wheel and change linearly or stepwise. The cutting speed of the grinding wheel in a horizontal (rotational) direction should be within the range of 25 to 75 m/sec. With this arrangement, the contact pressure and grinding heat that is generated between the work piece and the hard abrasive grains during grinding are combined. In other words, mechanical and thermal actions are combined.
    • 公开了一种工业上可行的研磨氮化硅陶瓷的方法,并提供了足够光滑的表面。 即,表面的最大高度粗糙度Rmax为0.1微米以下,十点平均粗糙度Rz为0.05微米。 此外,通过该方法,可以在磨削时修复表面损伤。 研磨轮进入工件的垂直切削进给速率应在车轮工作表面的每次旋转中在0.005-0.1微米的范围内,并且线性或逐步改变。 砂轮在水平(旋转)方向上的切割速度应在25至75米/秒的范围内。 通过这种布置,在磨削期间在工件和硬磨料颗粒之间产生的接触压力和磨削热被组合。 换句话说,组合了机械和热动作。