Zirconia ceramics and method for producing same
    5.
    发明授权
    Zirconia ceramics and method for producing same 失效
    氧化锆陶瓷及其制造方法

    公开(公告)号:US4977114A

    公开(公告)日:1990-12-11

    申请号:US438946

    申请日:1989-11-17

    IPC分类号: C04B35/48 C04B35/486

    CPC分类号: C04B35/486

    摘要: Disclosed are zirconia ceramics superior in mechanical strength, hardness and toughness and a method for producing them. The zirconia ceramics contain ca. 7-12 mol % of cerium oxide and ca. 2-7 mol % of magnesium oxide and have an average crystal grain size of crystal grains thereof of 1 .mu.m or less, at least ca. 80 mol % of the crystal grains being tetragonal grains and the balance being monoclinic grains, and have a bending strength of at least 100 kg/mm.sup.2, a fracture toughness of at least 10 MNm.sup.-1.5 and a Vickers hardness of at least 1000 kg/mm.sup.2. The method comprises calcining a hydrate obtained by coprecipitation method from water-soluble salts of cerium and magnesium and a basic salt of zirconium or a hydrate obtained by adding water-soluble salts of cerium and magnesium to a zirconium hydrate and neutralizing the mixture of hydrates, further grinding the calcined hydrate to obtain zirconia powders of 1 .mu.m or less in average crystal grain size, then shaping the powders and sintering the resulting shaped product.

    摘要翻译: 公开了机械强度,硬度和韧性优异的氧化锆陶瓷及其制造方法。 氧化锆陶瓷含有 7-12摩尔%的氧化铈和约 2-7mol%的氧化镁,其晶粒的平均晶粒尺寸为1μm以下,至少约为。 80μmol%的晶粒为四方晶粒,余量为单斜晶粒,弯曲强度为至少100kg / mm2,断裂韧性为至少10MNm-1.5,维氏硬度至少为1000kg / mm2。 该方法包括通过共沉淀法从铈和镁的水溶性盐和通过向水合锆中加入铈和镁的水溶性盐而得到的锆或水合物的碱式盐,并且中和水合物的混合物, 进一步研磨煅烧水合物,得到平均晶粒尺寸为1μm以下的氧化锆粉末,然后成形粉末并烧结所得成型体。

    Wheel slippage control apparatus in motor vehicle
    10.
    发明授权
    Wheel slippage control apparatus in motor vehicle 失效
    机动车辆滑轮控制装置

    公开(公告)号:US5159990A

    公开(公告)日:1992-11-03

    申请号:US676477

    申请日:1991-03-27

    摘要: A slip control apparatus for use in a motor vehicle having an engine for generating a motive power to drive the motor vehicle. The apparatus comprises a first detector for detecting a speed of a driven wheel of the motor vehicle which is driven by the motive power generated from the engine, a second detector for detecting a running speed of the motor vehicle and a third detector for detecting an acceleration of the driven wheel. Also included in the apparatus are a decision unit for determining the occurrence of slipping of the driven wheel on the basis of the detection results of the first and second detectors, a driving force adjusting device for adjusting a driving force of the motor vehicle, and a control unit for controlling the slip of the driven wheel on the basis of information from the first to third detectors. The control unit controls the driving force adjusting device on the basis of the acceleration detected by the third detector when the decision device has determined the occurrence of slipping of the driven wheel.

    摘要翻译: 一种用于具有用于产生用于驱动机动车辆的动力的发动机的机动车辆中的滑动控制装置。 该装置包括用于检测由发动机产生的动力驱动的机动车辆的从动轮的速度的第一检测器,用于检测机动车辆的行驶速度的第二检测器和用于检测加速度的第三检测器 的从动轮。 还包括在装置中的判定单元,用于根据第一和第二检测器的检测结果确定从动轮的滑动的发生,用于调节机动车辆的驱动力的驱动力调节装置,以及 控制单元,用于根据来自第一至第三检测器的信息来控制从动轮的滑动。 当决定装置确定从动轮的滑动的发生时,控制单元基于由第三检测器检测到的加速度来控制驱动力调节装置。