(1. 北京有色金屬研究總院 復合材料中心，北京100088；
2. 中國鋁業(yè)公司，北京 100814；
3. 上海寶山鋼鐵公司，上海 201900；
4. 兵器工業(yè)第五二研究所，包頭 014034；
5. 北京科技大學 材料科學與工程學院，北京 100083)
摘 要: 針對Al-Fe2O3體系，研究了ZrSiO4和TiO2添加劑對離心SHS陶瓷復合鋼管組織結(jié)構(gòu)和性能的影響。添加ZrSiO4時，沒有致密化作用，陶瓷層主要由α-Al2O3，F(xiàn)eAl2O4和很少量的m-ZrO2等相構(gòu)成，其結(jié)合強度隨著ZrSiO4量的增加而下降，而后又有一定程度的提高，分解出的ZrO2對陶瓷基體有微裂紋韌化作用。當添加TiO2時，致密化作用好，在TiO2添加量為10%時，陶瓷層的孔隙率下降了42%。陶瓷層主要由α-Al2O3，F(xiàn)eAl2O4和極少量的Fe4(TiO4)3等相構(gòu)成，其結(jié)合強度隨著TiO2量的增多有較大幅度提高。TiO2促進燒結(jié)，提高了Al2O3的致密度和強度，減小了Al2O3的熱裂傾向。
關(guān)鍵字: 離心；自蔓延高溫合成；陶瓷涂層；添加劑
microstructures and properties of
ceramic-lined composite pipe made by
centrifugal-SHS process
LI Jun3, GAO Qiu-fan4, WANG Ke-zhi5
（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
