作者: Ajit Y. Sane
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摘要: The invention relates to the production of desirably consolidated high purity refractory metal borides, carbides, nitrides, or mixtures, combinations cermets thereof. In preparation, a second stage reaction is conducted at reduced pressure and sintering temperature. Furthermore, it carried out in presence aid which can be initially present as particulate material and, such, may incorporated with other ingredients. Sintering aid, dual role, serve not only an assistant reaction, but also participant. Moreover, during such rection conditions, assistance obtained by means vapor. High products desirable microstructure achieved, having densities on order 90 percent more.