Abstract:
A hard drive disk substrate is formed of a multi-phase ceramic-based material having at least two phases with amorphous phases being present in an amount less than 1 volume percent based on the volume of the ceramic-based material or at least one phase being free metal. A process for producing the ceramic-based disk substrate is produced by forming a flat disk of a porous ceramic and then infiltrating the porous ceramic with a metal whereby a multi-phase ceramic-based computer hard drive disk is produced. Additionally, a step of passivating the porous ceramic by elevating it to a temperature of 1300 DEG C to 1800 DEG C before the infiltrating step may be performed, such that the surfaces are passivated and the reaction kinetics can be controlled during the infiltrating step. A preferred composite material is made of a multi-phase boron-carbide composite material including grains having peaks with an average roughness value, Ra, of between 1 to 200 ANGSTROM , the roughness value being formed in situ by causing a microhardness gradient of between 19 and 3200 Kg/mm in the various phases of the multi-phase boron-carbide composite material.
Abstract translation:硬盘驱动器盘基底由多相陶瓷基材料形成,该材料具有至少两相,无定形相以基于陶瓷基材料的体积为基础的量小于1体积%,或至少一相位为 免费金属。 通过形成多孔陶瓷的平板,然后用金属渗透多孔陶瓷来制造陶瓷基盘基板的方法,由此制造多相陶瓷基计算机硬盘驱动盘。 此外,可以进行在浸渗步骤之前将其升高至1300℃至1800℃的温度来钝化多孔陶瓷的步骤,使得表面被钝化,并且可以在渗透步骤期间控制反应动力学。 优选的复合材料由多相碳化硼复合材料制成,其包括具有平均粗糙度值Ra的平均粗糙度Ra在1至200之间的晶粒,其粗糙度值是通过使显微硬度梯度为19 在多相碳化硼复合材料的各个相中为3200Kg / mm 2。
Abstract:
Hard disk drive components, such as sliders, load beams, support arms, actuators, actuator bearings, spacers, clamps, spindles, ball bearings, thrust bearings, journal bearings, base plates, housings, and covers, formed of a multi-phase ceramic-based material. One method of making the hard disk drive components includes (a) forming a porous body of ceramic; (b) infiltrating a liquid into the pores of the ceramic body; (c) solidifying the infiltrated liquid; and (d) machining the metal-infiltrated ceramic body to form the hard disk drive component.
Abstract:
Hard disk drive components, such as, sliders, load beams, support arms, actuators, actuator bearings, spacers, clamps, spindles, ball bearings, thrust bearings, journal bearings, base plates, housings, and covers, formed of a multi-phase ceramic-based material. One method of making the hard disk drive components includes (a) forming a porous body of ceramic; (b) infiltrating a liquid into the pores of the ceramic body; (c) solidifying the infiltrated liquid; and (d) machining the metal-infiltrated ceramic body to form the hard disk drive component.