Activation of self-sustaining high-temperature reactions by mechanical processing of Ti-C powder mixtures

被引：22

作者：

Delogu, Francesco ^{[1
]}

机构：

[1] Univ Cagliari, Dipartimento Ingn Meccan Chim & Mat, I-09123 Cagliari, Italy

来源：

SCRIPTA MATERIALIA | 2013年 / 69卷 / 03期

关键词：

Mechanical milling; self-propagating high-temperature synthesis; Carbides; Phase transformations; MECHANOCHEMICAL SYNTHESIS; AMORPHIZATION PROCESSES; COMBUSTION SYNTHESIS; KINETICS; SIMULATION; SYSTEM;

D O I：

10.1016/j.scriptamat.2013.03.033

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ti-C powder mixtures of various chemical compositions were ball-milled at different collision energies. Within a relatively broad compositional range, the mechanical processing activates self-sustaining high-temperature reactions resulting in the formation of non-stoichiometric TiC phases. The number of collisions necessary to ignite the reaction varies with the chemical composition and the collision energy. It is shown that the experimental findings can be rationalized by assuming that a certain volume fraction of Ti must be suitably activated. (c) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：223 / 226

页数：4

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