Coating the surface of mild steel, heat-resistant steel, heat-resistant alloys, molybdenum, cermets, etc. with ceramics to improve heat resistance. Usually, this is done by applying a glaze to the surface and firing it. In the narrow sense, glaze refers to heat-resistant enamels that are mainly made of glass, but generally it also includes other fire-resistant crystalline materials. A method is also used in which the molten components are melted with an oxygen-acetylene flame using a special melting injection device and then sprayed onto the metal surface with compressed air. It is used in jet engines and nuclear reactor parts, etc. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
耐熱性をよくするために,軟鋼,耐熱鋼,耐熱合金,モリブデン,サーメットなどの表面にセラミックスを被覆すること。普通,釉 (うわぐすり) を表面に施して焼成して行われ,狭義には,釉がおもにガラス質のものを含む耐熱ほうろうをさすが,一般にはその他の耐火性結晶質をも含む。特殊な溶融噴射装置を用いて溶融成分を酸素-アセチレン炎で溶かし,圧搾空気で金属表面へ吹きつける方法も行われている。ジェットエンジンや原子炉部品などに用いられている。
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