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采用自蔓延合成技术制备了钇铝石榴石(Y3Al5O12,YAG)陶瓷块体材料。利用ANSYS软件的瞬态热分析功能,对压块传热和传质过程进行了模拟与实验验证;在此基础上,结合压块燃烧过程温度场的模拟结果,对铝热剂燃烧合成YAG块体的相结构形成过程进行了分析研究,对不同点燃方式下(区域点火、面点火)压块传热过程进行了模拟。研究表明:模拟结果与实验结果吻合较好,从而验证了该模拟方法及物性参数选择的可靠性;淬熄后压块不同区域内的组织结构和成分分布存在较大差异,表明自蔓延燃烧合成YAG材料过程中,压块的传热、传质及点火方式对燃烧速度及物相的形成具有显著影响。
Yttrium aluminum garnet (Y3Al5O12, YAG) ceramic bulk material was prepared by self-propagating synthesis technology. The heat transfer and mass transfer process of briquettes were simulated and verified by the transient thermal analysis function of ANSYS software. Based on the simulation results of the temperature field in briquetting process, the YAG block Body phase structure formation process was analyzed and studied under different ignition mode (regional ignition, surface ignition) briquette heat transfer process was simulated. The results show that the simulation results are in good agreement with the experimental results, which verifies the reliability of the simulation method and the selection of physical parameters. The structure and composition distribution in different regions of the billet after quenching are quite different, indicating that self-propagating combustion synthesis In the process of YAG material, the heat transfer, mass transfer and ignition mode of briquettes have a significant effect on the combustion rate and the formation of phase.