| 燃煤MHD发电Al2O3基电极间绝缘材料抗裂性的改善 |
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| 引用本文： | 刘传博.燃煤MHD发电Al2O3基电极间绝缘材料抗裂性的改善[J].东南大学学报(自然科学版),1994,24(4):51-55. |
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| 作者姓名： | 刘传博 |
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| 作者单位： | 东南大学材料科学与工程系 |
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| 基金项目： | 国家863高技术课题项目 |
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| 摘 要： | 为避免燃煤ＭＨＤ发电Ａｌ２Ｏ３陶瓷电极间绝缘片在动态试验中发生开裂的现象，作者进行了在Ａｌ２Ｏ３基材料中添加第二相（ＺｒＯ２，Ｓｉ３Ｎ４）以提高抗热震性和改善抗裂性的研究。结果表明，所研制的Ａｌ２Ｏ３－ＺｒＯ２－Ｓｉ３Ｎ４多相复合新材料与Ａｌ２Ｏ３陶瓷相比，室温抗弯强度提高１４０％，抗热震临界温差△Ｔ提高７５％。在动态电弧加的器法拉第通道进行２５ｈ试验后，电极间绝缘片全部完整，棱角清晰。
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| 关 键 词： | 氧化铝 陶瓷材料 MHD发电 抗裂性 |
Improvement of Crack Resistance of Al_2O_3 Base Interelectrode Insulator Materials for MHD Power Generation |
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| Liu Chuanbo.Improvement of Crack Resistance of Al_2O_3 Base Interelectrode Insulator Materials for MHD Power Generation[J].Journal of Southeast University(Natural Science Edition),1994,24(4):51-55. |
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| Authors: | Liu Chuanbo |
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| Abstract: | It is shown from the MHD gererator test that the Al2o3 interelectrode insulator plates were generally damaged in forms of crack. In order to solve this problem .ZrO2 and Si3N4 are added in to gain a new kind of alumina base composite material .And its resistance to heat shocks is further stud-ied,The results show that the flexural strength and its critical temperature of resistance to heat shocks could be ,respectively ,140%and 75%higher than that of alumina.Therefore,the alumina base ma-terial could be improved dramatically on the resistance to heat shocks,After 250 h dynamic test ofMHD ,the interelectrode insulator plates made of new composite have complete appearance and clearedges and corners. |
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| Keywords: | insulating materials aluminium oxide composite material MHD generator resistance to heat shocks |
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