| Effects of Y2O3 on Thermal Shock of Al2O3／TiCN Composites |
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| 引用本文： | 邱关明,李喜坤,修稚萌,孙旭东,严长浩,代少俊. Effects of Y2O3 on Thermal Shock of Al2O3／TiCN Composites[J]. 中国稀土学报(英文版), 2005, 23(3): 266-270 |
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| 作者姓名： | 邱关明 李喜坤 修稚萌 孙旭东 严长浩 代少俊 |
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| 作者单位： | Changchun University of Science and Technology，Changchun 130022，China，Nanjing University of Technology，Nanjing 210009，China，Nanjing University of Technology，Nanjing 210009，China，Shenyang University of Science and Technology，Shenyang 110168，China，Northeastern University，Shenyang 110004，China，Northeastern University，Shenyang 110004，China，Nanjing University of Technology，Nanjing 210009，China，Nanjing University of Technology，Nanjing 210009，China |
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| 基金项目： | 国家自然科学基金，辽宁省自然科学基金 |
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| 摘 要： | Advancedstructuralceramics ,suchasoxides ,nitridesandcarbides ,havebecomepreferredrefracto rymaterialsforaviation ,spaceflight ,energyandmet allurgybecauseoftheirchemicalstability ,creepresis tanceandhightemperaturestrength .Buttheyareaf fectedgreatlybyte…
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| 关 键 词： | Al2O3-30％TiCN-0.2％Y2O3 |
Effects of Y2O3 on Thermal Shock of Al2O3/TiCN Composites |
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| QIU Guanming,Li Xikun,Xiu Zhimeng,SUN Xudong,Yan Changhao,Dai Shaojun. Effects of Y2O3 on Thermal Shock of Al2O3/TiCN Composites[J]. Journal of Rare Earths, 2005, 23(3): 266-270 |
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| Authors: | QIU Guanming Li Xikun Xiu Zhimeng SUN Xudong Yan Changhao Dai Shaojun |
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| Abstract: | Thermal shock resistance of Al2O3-TiCN(30%)-Y2O3(0.2%) composite was studied by hot pressing(HP) method at different temperatures. The study shows that thermal shock resistance of the material is determined by its microstructure and reinforced mechanism. According to SEM and calculation of thermal shock, the fractured surface of Al2O3-30%TiCN-0.2%Y2O3 composite is undulate. The residual strength of Al2O3-30%TiCN-0.2%Y2O3 is higher than Al2O3-30%TiCN at 200～800 ℃ after thermal shock. Cracks initiation resistance (R')and cracks propagation resistance (R″″)of Al2O3-30%TiCN-0.2%Y2O3 composite increases 12% and 5% respectively compared with that of Al2O3-30%TiCN. It matches with experimental results. The addition of Y2O3 forms YAG that inhibits crystal growth, and increases fracture stress, fracture toughness, cracks initiation resistance and cracks propagation resistance. Therefore, thermal shock resistance increases. The fracture work of Al2O3-30%TiCN and Al2O3-30%TiCN-0.2%Y2O3 composites are 132 and 148 J·m-2 respectively. |
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| Keywords: | composite thermal shock bending strength work of fracture rare earths |
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