Research of Modification on Shocked Aluminium Nitride Powder through X-Ray Diffraction
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摘要: 利用X射线衍射分析技术及Warren-Averbch分析方法，详细地研究了氮化铝陶瓷粉体在名义压力为9.8 GPa的冲击波压力作用下的晶格缺陷，得到了晶格畸变与晶胞柱尺寸的关系数值，分析结果表明，其相干散射区域尺寸远小于颗粒的真实尺寸，说明冲击波作用在氮化铝陶瓷粉体中产生了严重的晶格缺陷。Abstract: The changes of microstrain and dislocation density caused by shock wave on aluminum nitride ceramic powder have been researched, by X-ray diffraction method the relationship between the microstrain and the size of the crystallite is obtained. According to Warren-Averbch analysis, this means that the size of the coherent scattering region is far smaller than the size of the granula. It demonstrates that the shock wave treatment can generate large amount of crystal lattice defects in aluminum nitride.
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Key words:
- shock wave modification /
- aluminium nitride /
- crystal lattice defect /
- X-ray diffraction
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Beauchamp E K. Shock-Activated Sintering. In: Oraham R A, Sawaoka A B, eds. High Pressure Shock Waves Precessing of Ceramics. Trans Tech Publ, 1987: 141-174. Hechel R W, Youngblood J L. J Amer Ceram Soc, 1968, 51: 398-401. 李树棠. 晶体X射线衍射学基础. 长沙: 中南工业大学出版社, 1990: 169-187. Warren B E, Averbch B L. J Appl Phys, 1950, 21: 595-598. Faukner E A. Phil Mag, 1960, 5: 519-521. Williamson G K, Smallman R E. Phil Mag, 1956, 1: 34-46. -
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