利用原位反应自发渗透技术制备了组织均匀且致密度高的TiCp/Mg复合材料, 研究了原位反应温度以及碳颗粒尺寸对制备的TiCp/Mg复合材料微观组织的影响.结果表明: 当使用大尺寸碳粒子(≤100μm)时, 随着反应温度的提高, 原位生成物TiCp的含量增加, 但有残留反应物Ti和C的存在; 碳粒子尺寸减小(≤30μm)时, 原位反应较完全, 不再有残留物存在; 原位反应产物组织中, 增强相TiCp主要呈互穿网络状、颗粒状以及片状等形态; 增强相的尺寸随碳粒子尺寸的减小而减小, 在碳颗粒尺寸为1.5μm时TiC更易呈现等轴颗粒状, 尺寸约为0.5～2.0μm.
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