CuO对重力分离SHS陶瓷内衬复合管组织的影响

Influence of CuO on Macrostructure of Ceramic Composite Pipe Fabricated by Gravitational Separation-SHS Method

采用重力分离自蔓延高温合成法(Self-propagating High-temperature Synthesis,简称SHS)法,以(Al-Fe2O3-CuO)+SiO2复合铝热体系为铝热剂,制备了陶瓷内衬复合管。分析了添加剂CuO对陶瓷层组织的影响。XRD分析表明,陶瓷层主晶相为α-Al2O3、FeAl2O4、Al2SiO5,复合管的中间金属层由α相(Cu在α-Fe中的固溶体)和Cu相组成。CuO作为助燃剂,可提高燃烧速度和燃烧温度并减少陶瓷中FeAl2O4的含量。

The composite pipes have been made by gravitational separation self-propagating high-temperature synthesis （SHS） method with （Al-Fe2O3-CuO）＋SiO2 composite system. The effect of the additions CuO on ceramic layer has been investigate, d. The results of XRD show that the main phases of the ceramic were α-Al2O3 ,FeAl2O4 ,Al2SiO5, the intermediate metallic layer consisted of a phase（ the solid solution of Cu in α-Fe） and Cu phase. Al-CuO acted as combustion-supporting agent can increase combustion rate and combustion temperature, and decreases the FeAl2O4 content of ceramics.