| 冲击波合成立方氮化硅粉体的耐腐蚀性及热稳定性 |
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| 引用本文： | 姚怀,徐巧玉,唐敬友. 冲击波合成立方氮化硅粉体的耐腐蚀性及热稳定性[J]. 硅酸盐学报, 2010, 38(2): 289-293 |
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| 作者姓名： | 姚怀 徐巧玉 唐敬友 |
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| 作者单位： | 河南科技大学材料科学与工程学院,河南,洛阳,471003;河南科技大学机电工程学院,河南,洛阳,471003;西南科技大学材料科学与工程学院,四川,绵阳,621010 |
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| 基金项目： | 国家自然科学基金(50472102)资助项目 |
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| 摘 要： | 以α-Si3N4为原料,采用冲击波法合成了γ-Si3N4粉体。在1660～1690K温度下对γ-Si3N4粉体进行高温稳定性研究并利用氢氟酸对γ-Si3N4粉体进行耐腐蚀性研究。结果表明:真空条件下,在1660K时,γ-Si3N4粉体较为稳定;在1680K时,保温10min和30min后,γ-Si3N4向β-Si3N4的转变率分别为5%和90%。在1690K时,γ-Si3N4在10min内能够完全转变为β-Si3N4。在470K的温度下γ-Si3N4粉体能够与氢氟酸缓慢反应。在490K的温度下,0.2gγ-Si3N4粉体腐蚀5h后,能够与氢氟酸完全反应,生成气体而挥发。
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| 关 键 词： | 立方氮化硅 冲击波合成 相变 腐蚀 |
THERMAL STABILITY AND CORROSION RESISTANCE OF CUBIC SILICON NITRIDE POWDERS PREPARED BY SHOCK SYNTHESIS |
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| YAO Huai,XU Qiaoyu,TANG Jingyou. THERMAL STABILITY AND CORROSION RESISTANCE OF CUBIC SILICON NITRIDE POWDERS PREPARED BY SHOCK SYNTHESIS[J]. Journal of The Chinese Ceramic Society, 2010, 38(2): 289-293 |
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| Authors: | YAO Huai XU Qiaoyu TANG Jingyou |
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| Affiliation: | 1.School of Materials Science and Engineering;Henan University of Science and Technology;Luoyang 471003;Henan;2.School of Electromechanical Engineering;3.School of Materials Science and Engineering;Southwest University of Science and Technology;Mianyang 621010;Sichuan;China |
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| Abstract: | The thermal stability of γ-Si_3N_4 powder prepared by shock wave synthesis using α-Si_3N_4 as raw material was investigated at temperatures between 1 660 K and 1 690 K, and its corrosion resistance to hydrofluoric acid was studied as well. The results show that γ-Si_3N_4 powder is quite stable at 1 660 K, and after the powder is soaked at 1 680 K for 10 and 30 min, the ratio of transformation from γ-Si_3N_4 to β-Si_3N_4 is about 5% and 90%, respectively. The γ-Si_3N_4 powder can be completely transformed into β- Si_3N_4 after being soaked at 1 690 K for 10 min. The γ-Si_3N_4 powder can react with hydrofluoric acid at 470 K. At 490 K, 0.2 g γ-Si_3N_4 powder can completely react with hydrofluoric acid and be converted into gas phase after 5 h. |
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| Keywords: | cubic silicon nitride shock wave synthesis phase transformation corrosion |
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