摘要:
Provided is a SiC substrate treatment method for, with respect to a SiC substrate (40) that has, on its surface, grooves (41), activating ions while preventing roughening of the surface of the substrate. In the method, an ion activation treatment in which the SiC substrate (40) is heated under Si vapor pressure is performed to the SiC substrate (40) has, on its surface, an ion implantation region (46) in which ions have been implanted, and has the grooves (41) provided in a region including at least the ion implantation region (46), thereby ions that are implanted in the SiC substrate (40) is activated while etching the surface of the substrate.
摘要:
Provided is a surface treatment method for a SiC substrate (40), the method being capable of controlling whether to generate a step bunching or the type of step bunching that is generated. In the surface treatment method in which the surface of the SiC substrate (40) is etched by heating the SiC substrate (40) under Si vapor pressure, an etching mode and an etching depth which are determined at least on the basis of an etching rate, are controlled to etch the SiC substrate (40), so that a surface pattern of the SiC substrate (40) after etching treatment is controlled.
摘要:
Provided is a method in which the rate of growth is not lowered even when a cut SiC seed crystal is used in performing MSE process. A SiC seed crystal that is used as a seed crystal in metastable solvent epitaxy process (MSE process) is heated under Si atmosphere and the surface of the SiC seed crystal is etched to remove a work-affected layer that was formed by cutting. Work-affected layers generated on SiC seed crystals are known to inhibit growth during MSE process, and therefore removing the work-affected layers can prevent lowering of the rate of growth.
摘要:
An object is to provide a graphite-copper composite electrode material that is capable of reducing electrode wear to a practically usable level and to provide an electrical discharge machining electrode using the material. A graphite-copper composite electrode material includes a substrate comprising a graphite material and having pores, and copper impregnated in the pores of the substrate, the electrode material having an electrical resistivity of 2.5 µΩm or less, preferably 1.5 µΩm or less, more preferably 1.0 µΩm or less. It is desirable that the substrate comprising the graphite material have an anisotropy ratio of 1.2 or less. It is desirable that an impregnation rate ϕ of the copper in the electrode material is 13% or greater. It is desirable that the substrate comprising the graphite material have a bulk density of from 1.40 Mg/m 3 to 1.85 Mg/m 3 .
摘要翻译:本发明的目的是提供一种石墨 - 铜复合电极材料,其能够将电极磨损降低到实际可用的水平,并提供使用该材料的放电加工电极。 石墨 - 铜复合电极材料包括含有石墨材料并具有孔隙的基底和浸渍在基底孔中的铜,该电极材料的电阻率为2.5微米或更小,优选为1.5微米或更小 ,更优选为1.0μm以下。 希望包含石墨材料的基板的各向异性比为1.2以下。 希望电极材料中铜的浸渍率为13%以上。 希望包含石墨材料的基材的堆积密度为1.40Mg / m 3至1.85Mg / m 3。
摘要:
Provided is a method for carburizing a tantalum member whereby the tantalum member is less deformed by carburization and can be carburized with good flatness of the planar part thereof and in a uniform manner. The method is a method for subjecting a tantalum member 1 made of tantalum or a tantalum alloy and having a planar part 1a to a carburization process for allowing carbon to penetrate the member 1 from the surface toward the inner portion thereof and includes the steps of: setting the tantalum member 1 in a chamber 3 containing a carbon source by supporting the planar part 1a on a plurality of support rods 6 tapered at distal ends 6a thereof; and subjecting the tantalum member 1 to a carburization process by reducing in pressure and heating the interior of the chamber 3 to allow carbon derived from the carbon source to penetrate the tantalum member 1 from the surface thereof.
摘要:
A carbonaceous material is fabricated by a mixture of carbon powder and a binder. 10 % by weight or more and 60 % by weight or less of metal powder to the fabricated carbonaceous material is mixed. The mixed carbonaceous material and metal powder are pressurized and formed. A brush base material is fabricated by burning of the pressurized and formed carbonaceous material and metal powder. The fabricated brush base material is impregnated with oil. An impregnation rate of the oil to the mixed carbonaceous material and metal powder may be 0.5 % by weight or more, for example.
摘要:
A carbon material for bearings includes a porous carbon base material and an impregnation material. The impregnation material is made of resin or metal, and with which the carbon base material is impregnated. The carbon material for bearings includes a plurality of pores. When a pore distribution in the carbon material for bearings is measured by a mercury penetration method using a mercury porosity meter, a cumulative pore volume of pores having a diameter larger than 0.1 µm is not more than 8 mm 3 /g.