Process for producing non-oxide powders
AssigneeHitachi Metals, Ltd.
InventorsHisao Hara, Hirohide Yamada
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Abstract
Non-oxide powders such as carbides, nitrides, carbides/nitrides and borides are obtained by reducing an oxide powder in a reducing atmosphere, and after or concurrently with the reduction, treating the reduced powder in a carbonizing atmosphere, a nitrogenizing atmosphere, a carbonizing and nitrogenizing atmosphere, or a boronizing atmosphere. As the above oxide powder, there is used a brittle material obtained by rapid cooling of a melted oxide. The non-oxide powders obtained are utilized as a hard component of cemented carbides and cermet. These powders are fine particles having a particle size of 1.0 .mu.m or smaller and a high purity.
Claims15
A process for producing non-oxide powders, which comprises rapidly cooling a molten oxide to produce a brittle oxide material, reducing the oxide material in a reducing atmosphere, and after or concurrently with the reduction, subjecting the resulting reduced powder to heat treatment in a carbon-containing atmosphere, a nitrogen-containing atmosphere, a carbon and nitrogen-containing atmosphere, or a boron-containing atmosphere to obtain non-oxide powder of a carbide, a nitride, a carbide/nitride or a boride, respectively.
Dependencies are inferred from the claim text.