| 高性能陶瓷内衬复合煤粉喷枪的研制 |
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| 引用本文： | 许宝才,王春梅,朱冰,段荣霞,赵忠民.高性能陶瓷内衬复合煤粉喷枪的研制[J].特种铸造及有色合金,2009,29(7). |
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| 作者姓名： | 许宝才 王春梅 朱冰 段荣霞 赵忠民 |
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| 作者单位： | 1. 军械工程学院先进材料研究所
2. 河北科技大学电气信息学院 |
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| 摘 要： | 采用燃烧合成方法制备了Al2O3陶瓷内衬复合煤粉喷枪,但单一的Al2O3陶瓷内衬层韧性差,抗热震性能低,造成喷枪的寿命短.通过在(CrO3+AD燃烧体系中添加ZrO2组元,采用SHS重力分离技术,制备出了高强度、高韧性的陶瓷内衬复合弯管煤粉喷枪,陶瓷内衬层为具有共晶结构的Al2O3=ZrO2复相陶瓷.在共晶结构中,ZrO2纤维直径可达到纳米/微米尺度,从而使陶瓷基体得以强化;同时棒状共晶结构的生长取向分布,又使陶瓷因棒晶桥接与拔出得以韧化,改善了喷枪陶瓷内衬的高温强度和耐磨性,有效地提高了煤粉喷枪的使用寿命.
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| 关 键 词： | 煤粉喷枪 纳微米复合陶瓷 韧化 |
Development of SHS Curved Ceramic-lined Composite Gun for Coal-dust-injection |
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| Xu Baocai,Wang Chunmei,Zhu Bing,Duan Rongxia,Zhao Zhongmin.Development of SHS Curved Ceramic-lined Composite Gun for Coal-dust-injection[J].Special Casting & Nonferrous Alloys,2009,29(7). |
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| Authors: | Xu Baocai Wang Chunmei Zhu Bing Duan Rongxia Zhao Zhongmin |
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| Abstract: | AI2O3 ceramic-lined composite gun for coal-dust-injection produced by combustion synthesis meth-od exhibited low service life as a result of low ductility and low thermal shock resistance of AI2O3 ceramic-lined layer. The ceramic-lined curved composite gun for coal-dust-injection with high strength and ductility can be produced successfully by introducing ZrO2 into(CrO3+AI) system based on SHS gravitational sepa-ration method, in which ceramic-lined layer consists of eutectic "AI2O3-ZrO2 composite ceramics. ZrO2 fiber with nano-micron size in diameters can enhance the ce-ramic matrix, and rod-like eutectic structure with ori-entation growth can improve the toughness of the ce-ramics as a result of rod-like eutectic grain bridge and pull-out, which can effectively improve the elevated strength and wear resistance of ceramic lined layer, so the service life of coal-dust-injection gun is greatly im-proved. |
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| Keywords: | SHS SHS Coal-dust-injection Gun Nano/mi-cron Composite Ceramic Toughness |
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