(1. 北京有色金属研究总院 复合材料中心，北京100088；
2. 中国铝业公司，北京 100814；
3. 上海宝山钢铁公司，上海 201900；
4. 兵器工业第五二研究所，包头 014034；
5. 北京科技大学 材料科学与工程学院，北京 100083)
摘 要: 针对Al-Fe2O3体系，研究了ZrSiO4和TiO2添加剂对离心SHS陶瓷复合钢管组织结构和性能的影响。添加ZrSiO4时，没有致密化作用，陶瓷层主要由α-Al2O3，FeAl2O4和很少量的m-ZrO2等相构成，其结合强度随着ZrSiO4量的增加而下降，而后又有一定程度的提高，分解出的ZrO2对陶瓷基体有微裂纹韧化作用。当添加TiO2时，致密化作用好，在TiO2添加量为10%时，陶瓷层的孔隙率下降了42%。陶瓷层主要由α-Al2O3，FeAl2O4和极少量的Fe4(TiO4)3等相构成，其结合强度随着TiO2量的增多有较大幅度提高。TiO2促进烧结，提高了Al2O3的致密度和强度，减小了Al2O3的热裂倾向。
关键字: 离心；自蔓延高温合成；陶瓷涂层；添加剂
microstructures and properties of
ceramic-lined composite pipe made by
centrifugal-SHS process
（1. General Research Institute for Nonferrous Metals, Beijing 100088, China;
2. China Aluminum Industry Corporation, Beijing 100814, China;
3. Shanghai Baoshan Iron and Steel Corporation, Shanghai 201900, China;
4. No. 52 Research Institute of Ordnance Industry, Baotou 014034, China;
5. University of Science and Technology Beijing, Beijing 100083, China）
Abstract:ZrSiO4 and TiO2 were added as additives into the system of Al-Fe2O3, their effects on the microstructures and properties of ceramic-lined composite pipe made by centrifugal-SHS (self-propagating high-temperature synthesis) process were studied. When the additive is ZrSiO4, the phase of the ceramic layer is mainly composed of α-Al2O3, FeAl2O4 and minority of m-ZrO2. The ceramic porosity increases and the bonding strength of the ceramic layer decreases with the increase of ZrSiO4. The toughness of the ceramic layer is improved by microcracks induced due to phase transition of t-ZrO2 to m-ZrO2 coming from the decomposition of ZrSiO4. When the additive is TiO2, the phase of the ceramic layer is mainly composed of α-Al2O3, FeAl2O4 and tittle Fe4(TiO4)3. The ceramic porosity decreases and the bonding strength of the ceramic layer increases quickly with increasing the content of TiO2; the improvement of ceramic crack failure lies in that the rupture strength is increased and that the tendency of thermal crack formation is diminished.
Key words: centrifugal; SHS; ceramic coating; additive
