摘要:
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 about 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 about 1300.degree. to about 1800.degree. 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 about 1 to about 200.ANG., the roughness value being formed in situ by causing a micro hardness gradient of between about 19 and about 3200 Kg/mm.sup.2 in the various phases of the multi-phase boron carbide composite material.
摘要翻译:硬盘驱动器盘基板由具有至少两相的多相陶瓷基材料形成,其中无定形相以基于陶瓷基材料的体积或至少一相的量存在的量小于约1体积% 是免费金属。 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,可以在渗透步骤之前将其升高至约1300℃至约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的峰值在约1至约200之间的晶粒,该粗糙度值通过使原位形成的微观硬度梯度 在多相碳化硼复合材料的各个相中约19至约3200Kg / mm 2。
摘要:
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 about 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 about 1300.degree. to about 1800.degree. 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 about 1 to about 200 .ANG., the roughness value being formed in situ by causing a micro hardness gradient of between about 19 and about 3200 Kg/mm.sup.2 in the various phases of the multi-phase boron carbide composite material.
摘要翻译:硬盘驱动器盘基板由具有至少两相的多相陶瓷基材料形成,其中无定形相以基于陶瓷基材料的体积或至少一相的量存在的量小于约1体积% 是免费金属。 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,可以在渗透步骤之前将其升高至约1300℃至约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的峰值在约1至约200之间的晶粒,该粗糙度值通过使原位形成的微观硬度梯度 在多相碳化硼复合材料的各个相中约19至约3200Kg / mm 2。
摘要:
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.
摘要:
A concrete article comprised of concrete having therein a reinforcing polymer that has a surface comprised of a thermoplastic hydroxy-functionalized polyether or polyester. The concrete article is made by mixing concrete, water and a reinforcing polymer that has a surface comprised of a thermoplastic hydroxy-functionalized polyether or polyester and curing said concrete mixture forming the concrete article.
摘要:
A boron containing ceramic-aluminum metal composite is formed by mixing a boron containing ceramic with a metal powder comprised of aluminum or alloy thereof, shaping the mixture into a porous preform, contacting the preform with an infiltrating metal comprised of aluminum or alloy thereof that melts at a lower temperature than the metal powder and heating to a temperature sufficient to melt the infiltrating metal, but insufficient to melt the metal powder, such that the infiltrating metal infiltrates the porous preform to form the composite. The composite that is formed may be used for vehicular parts.
摘要:
A boron containing ceramic-aluminum metal composite is formed by mixing a boron containing ceramic with a metal powder comprised of aluminum or alloy thereof, shaping the mixture into a porous preform, contacting the preform with an infiltrating metal comprised of aluminum or alloy thereof that melts at a lower temperature than the metal powder and heating to a temperature sufficient to melt the infiltrating metal, but insufficient to melt the metal powder, such that the infiltrating metal infiltrates the porous preform to form the composite. The composite that is formed may be used for vehicular parts.
摘要:
An aluminum-boron-carbon abrasive article is comprised of at least three phases selected from the group consisting of: B.sub.4 C; AlB.sub.2 ; AlB.sub.12 ; AlB.sub.12 C.sub.2 ; Al.sub.4 C.sub.3 ; AlB.sub.24,C.sub.4 ; Al.sub.4 B.sub.1-3 C.sub.4 ; AlB.sub.24 C.sub.4 and Al.sub.4 BC. At least a portion of the surface of the abrasive article is comprised of abrasive grains of at least one phase selected from the group consisting of AlB.sub.24 C.sub.4, Al.sub.4 BC and AlB.sub.2, where the abrasive grains have an average grain size that is at least about two times greater than the average grain size of the grains containing boron and carbon within the abrasive article. The aluminum-boron-carbon abrasive article of claim 1 is prepared by heating, under a vacuum or inert atmosphere, a body comprised of at least one boron containing phase and at least one carbon containing phase in the presence of a separate source of aluminum, such as aluminum metal or alloy thereof. The boron and carbon containing phase each are selected from the group consisting of: B.sub.4 C; AlB.sub.2 ; AlB.sub.12 ; AlB.sub.12 C.sub.2 ; Al.sub.4 C.sub.3 ; AlB.sub.24,C.sub.4 ; Al.sub.4 B.sub.1-3 C.sub.4 ; AlB.sub.24 C.sub.4 and Al.sub.4 BC. The body is heated with the separate source of aluminum, such that at least a portion of the surface of the body is contacted by liquid or vaporous aluminum for a time and temperature sufficient to form the aluminum-boron-carbon abrasive article.
摘要:
Subject boron carbide to a passivation treatment at a temperature within a range of 1350.degree. C. to less than 1800.degree. C. prior to infiltration with a molten metal such as aluminum. This method allows control of kinetics of metal infiltration and chemical reactions, size of reaction products and connectivity of B.sub.4 C grains and results in cermets having desired mechanical properties.
摘要:
A method of coating a fluidizable material onto a surface of a substrate, wherein the substrate is not wettable by the fluidizable material includes depositing a layer of powder particles on the surface of the substrate, the powder particles being wettable by the fluidizable material; contacting the fluidizable material to the layer of powder particles; and allowing the fluidizable material to wick between the powder particles and to contact the surface of the substrate.The method of the invention provides a method which requires little or no binders or organic solvents, is applicable to many different ceramic-metal formulations, allows easy control of the thickness of the tape, forms fairly dense tapes so that little or no shrinkage occurs upon densification at elevated temperatures, and does not require undesirably high processing temperatures.
摘要:
A golf club with a multi-material face is disclosed herein. More specifically, the golf club head in accordance with the present invention has a striking face that forms a pocket, wherein the pocket is filled with a secondary material having a lower density to improve the performance of the golf club head. The multi-material face disclosed in accordance with the present invention may generally have a characteristic time slope of greater than about 5 and less than about 50, wherein the characteristic time slope is determined based on the various data points collected according to the United States Golf Association's (USGA's) Characteristic Time (CT) test.