摘要:
When a diamond is brazed to a metal substrate, while obtaining a stable joining strength, a joined interface of the diamond is not eroded to provide a good joint with a beautiful view. A brazing-filler material containing at least one selected from a group consisting of gold and silver, and copper as principal components, and further containing 0.001 to 5 mass % of vanadium is used. Preferably, a vanadium content is not more than 2.0 mass %, and more preferably not more than 0.5 mass %. Using this brazing-filler material, unidirectional solidification is performed from a side of diamond to form vanadium carbide in a joined interface in a shape of islands, and thereby an interface having a beautiful view with stable joining strength can be obtained. In addition, strong joining is possible also by a usual solidification method.
摘要:
A microwave plasma generating apparatus for generating plasma by radiating microwave into a space in which electric discharge takes place contains a plurality of microwave radiating means (1,1A,4,5,16,24;3,7) for radiating a plurality of microwaves having different directions of electric fields (Ex,Ey) from each other. This microwave plasma generating apparatus can produce a diamond thin film by exciting a carbon source gas supplied into the space and bringing the excited gas into contact with a substrate (14) to be formed thereon with the diamond thin film, the substrate (14) being disposed in the space in which the electric discharge is performed. This apparatus can produce a large volume of plasma in a stable fashion and, as a result, provide a diamond thin film in a large area as a whole.
摘要:
An annular thin plate blade (K1) having a cutting edge at its inner periphery and a method of producing the thin plate blade (K1) in which an annular member (40) made of polycrystalline diamond formed by vapor phase synthesis is provided at the inner periphery of the thin plate blade (K1) and the thin plate blade (K1) has a thickness of 20 to 300 µm.