利用HST-2型消失模涂料高温性能测试仪研究了涂料组成、涂层厚度、透气性、温度等对聚苯乙烯热解产物通过消失模涂层的传输特性的影响. 结果表明: 增加云母粉、珠光粉加入量及涂层厚度, 涂层透气性下降, 热解产物传输曲线的峰值上升, 传输时间增长. 探讨了模样热解产物通过涂层的传输行为对消失模铝铸件孔隙率的影响. 研究发现, 热解产物传输曲线峰值高、传输时间长, 有利于减少铝件的孔隙率. 当热解产物传输曲线的峰值及传输时间分别达到0.412kPa 和48.3s以上时, 铝铸件的针孔率可达到一级. 实验结果表明, 自制的HW-1涂料的传输性能可与美国Ashland涂料的相当.
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