针对制备泡沫铝异型件的熔体路径发泡先驱体二次发泡工艺,对TiH2的氧化处理、变温分解特性、等温分解特性、组织结构进行了研究.研究表明:氧化处理可有效提高发泡剂的开始分解温度,随氧化处理温度的提高,开始分解温度提高;氧化处理后发泡剂的等温分解曲线由低分解平台、快速分解阶段和稳定分解阶段3部分组成,低分解平台随氧化处理温度的提高而延长;400℃/6 h+500℃/1 h+620℃/30 s的处理,可使TiH2的分解量较400℃/6 h+500℃/1 h处理时有所提高;TiH2氧化处理后在其表面生成了厚约1.1~1.5 μm的TixOy致密氧化层,TiH2在300~550℃氧化,其物相依次变化为:TiH1.97-TiH1.97+TiO2-TiH1.97+TiO2+T2O-TiH1.97+TiO2+T2O+TiH.
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