摘要:
An excellent oxide series superconductive sintered body can be provided which can be joined to a metallic member easily and economically at low temperatures without causing peeling-off and deformation of the metallic member, cracks in the sintered body, and deterioration of the sintered body, by coating the surface of the sintered body with a coating metal. A method of producing the sintered body having the coating metal is also provided.
摘要:
A shaped material comprising powders of alloys containing easily oxidizable elements is fired in a hydrogen-based atmosphere containing at least one hydrocarbon gas in a total amount of 0.01-5.0 volume %. Therefore, the amount of oxides formed on the surfaces of material powder particles is reduced, and the sinterability of powder particle surfaces is improved owing to the sticking of atomic carbon thereto and thereby the mutual diffusion of powder particles becomes easy. As a result, there can be obtained a sintered alloy of desired density, superior in oxidation resistance, etc.
摘要:
A turbine rotor unit and a method of producing the same are disclosed. This turbine rotor unit comprises a ceramic rotor, a ceramic shaft integrally united with the ceramic rotor and a metal shaft provided with a cylindrical portion fixing the ceramic shaft therein and is characterized by having a gap between a substantial portion of the inner peripheral surface of the cylinder portion located near the side of the ceramic rotor and the outer surface of the ceramic shaft. Further, the turbine rotor unit is produced by arranging on one end of the metal shaft a cylindrical portion wherein an inner diameter at its opening side is larger than that at the bottom side, inserting the ceramic shaft into the cylindrical portion, and fixing the ceramic shaft to the cylindrical portion at its small diameter side.
摘要:
A ceramic-metal composite body including (a) a ceramic member, (b) a ferrous metal member bonded to the ceramic member, (c) an intermediate metallic member joined to the iron base member, and (d) an aluminum member bonded to the intermediate metallic member. The ceramic member and the aluminum member are integrally joined through the ferrous metal member and the intermediate metallic member.
摘要:
Metal ceramics composites having high bonding strength wherein a metal body and a ceramics body are bonded through a bonding layer are produced bycoating on the ceramic body a metallizing layer-forming composition, which forms through heat treatment with the ceramic body a metallizing layer consisting essentially of70-90% by weight of at least one of molybdenum metal and tungsten metal, 0.5-15% by weight of manganese oxide, 0.1-10% by weight of yttrium oxide, 0.1-15% by weight of aluminum oxide and 0.1-15% by weight of silicon dioxide,heating the ceramic body and the coated metallizing layer-forming composition to form and adhere the metallizing layer on the ceramic body,applying metal plating on either or both of the metallizing layer surface to be bonded and the metal body surface to be bonded, andbonding the thus obtained ceramic body and metal body by using a brazing metal.
摘要:
A sample container for heating a sample stored therein includes a resin layer on the whole inner surface of the container made of metal having a thickness ranging from 0.02 mm to 1.0 mm and the resin layer having a thickness ranging from 1 .mu.m to 100 .mu.m. A sample container for heating a sample stored therein includes a metal oxide layer on at least the whole inner surface of the container made of metal having a thickness ranging from 0.02 mm to 1.0 mm.
摘要:
A method for treating sintered alloy is disclosed by exposing a portion of the sintered alloy at a temperature ranging from about 800.degree. C. to about 1300.degree. C. under an atmosphere that contains an amount of water vapor corresponding to dew points ranging from about 30.degree. C. to about 60.degree. C. The method according to the present invention gives sintered alloy with a satisfactory protective layer that excels in smoothness and uniformity, and that prevents abnormal oxidation. Moreover, the method is especially useful to a sintered alloy having a complex structure and/or thin walls, such as a honeycomb structure.
摘要:
A metal-ceramic composite body is disclosed, which comprises a metallic member having a depression or through-hole therein, and a ceramic member having a protrusion capable of inserting into the depression or through-hole. Both the members are joined to each other through interference fitting below such a temperature that the structure of the metallic material begins to change into austenite phase or a temperature between the above temperature and a service temperature.
摘要:
Metal-ceramic composite bodies are disclosed which each comprise a metallic member and a ceramic member. The metallic member is integrally connected to the ceramic member by fitting the ceramic member itself or a projection formed on the ceramic member into a recess or a through hole formed in the metallic member. The hardness of a metallic portion of including at least a fitted portion between the metallic member and the ceramic member is not less than HRC 38. The roughness of the inner surface of the faces of the through hole of the metallic member at the fitted portion is not more than 8 .mu.m at the maximum height (R.sub.max) or not more than 0.5 .mu.m at the center line average roughness (R.sub.a). A process for manufacturing the same is also disclosed.
摘要:
A sample container for heating a sample stored therein includes a resin layer on the whole inner surface of the container made of metal having a thickness ranging from 0.02 mm to 1.0 mm and the resin layer having a thickness ranging from 1 .mu.m to 100 .mu.m. A sample container for heating a sample stored therein includes a metal oxide layer on at least the whole inner surface of the container made of metal having a thickness ranging from 0.02 mm to 1.0 mm.