自己熱反応によるTi-B系セラミックスの同時合成成形(4.固相反応法)(<特集>新技術によるセラミックスの合成と評価(II))

概要

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A new technique based on a self-propagating reaction is proposed for manufacturing ceramics by inducing the synthesis reaction and forming simultaneously. In this paper the effects of one-dimensional spring pressing on the densification of ceramics have been investigated. It is important for efficient densification to maintain the compacting pressure during processing in which a product shrinks significantly and also to apply the pressure along the propagating direction of the reaction front. The density of products in Ti-B system increased with increasing pressure and with decreasing spring constant for a given initial pressure. Final products with 95% relative density were produced from initial substances containing titanium more than 50% under the pressure of 20MPa. It has been found that crack-free products are produced by applying a large pressure at ignition time and the pressure of 10MPa after synthesis reaction in vacuum.
社団法人日本セラミックス協会の論文
1987-02-01