PURPOSE: To enable sufficient strength to be obtained even when subjected to high temperature and also enable it to be used stably for a long period by making fire-proof metallic fibers disposed in a basic body comprising a super alloy of a nickel or a cobalt have a specific coated layer of a niobium or a niobic alloy.
CONSTITUTION: The title compound has a two layered construction of basic bodies 6 consisting of a nickel or a cobalt, fireproof metallic fibers 3 disposed within the basic bodies and niobic layers 4 consisting of niobium or niobic alloy, and hard metallic layers 5 comprising the hard metal of an iron group covering the niobic layers, and is equipped with coating layers coating the fireproof metallic fibers. As fire-proof metallic fibers, it is preferred to employ W wire, Mo wire and Ta wire, and W wire containing at least a kind of ThO2, K, Si and Al. A fireproof composite serves to cover the surface of the fireproof metallic fibers 3 disposed within the basic bodies 6 comprising a hard metal of an Ni or a Co with super alloy layers comprising the niobic layers 4 and iron-based super alloy 5 and also serves to prevent various elements from dispersing from the super alloy of the Ni or Co as a matrix 6 to the fire-proof metallic fibers.
SUZUKI TAKAO
NAKABASHI MASAKO
TAKEDA HIROMITSU
OKUDE SHINICHIRO
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