TiとSi3N4のメカニカルアロイングによる複合セラミックスの合成

概要

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Mixtures of Si3N4, and Ti were milled with a high energy ball mill under argon atmosphere and successively sintered with a hot press. The resulted reaction products were fine mixtures of Ii5 Si3, TiSi2, IN and Si, their fractions varying according to initial compositions, milling time and sintering temperatures. The temperatures at which sintering proceeded was much lower than that for sintering of Si3N4, again depending upon compositions and milling time. The density of sintered products was high enough with hardness comparable to that of TiN. Sound indentations without cracking were noted.A model based on kinematical rather than thermodynamical equilibrium aspect was presented to explain the dependence of reaction products on process parameters.
社団法人粉体粉末冶金協会の論文