RECOVERY OF NEUTRON-IRRADIATION-INDUCED DEFECTS AND GAS REREASE OBSERVED BY DALATOMETRY-MASS SPECTROMETRY SYSTEM

聚变和裂变核反应堆需要几种陶瓷材料，人们认识到各种陶瓷材料的辐照响应受其晶体结构和原子键性质的影响。然而，对辐照引起的晶体缺陷及其热稳定性的识别还没有足够的了解，也没有得到统一的机制。此外，变形氦的再入效应被认为是与结构缺陷有关，而不是更复杂的现象。本研究采用高精度膨胀仪和质谱仪相结合的方法，对几种陶瓷材料的宏观长度回复进行了精确的观测，并定义了碳化硅、氮化硅和SiAlON晶型的辐照诱导晶体缺陷种类和热稳定性。

Several kinds of ceramics are necessary for fusion and fission nuclear reactors.and it is recognized that irradiation responses of various kinds of ceramics are influenced by their crystal structures and atomic bonding natures. However,identification of irradiation-induced crystalline defects and their thermal stabilities is not yet sufficientry understood, and unified mechnism is not obtained. Furthermore, recentry effects of transmuted He are suggested to be associated with structural defects then more complex phenomena occur. In this research, macroscopic length recovery for several kinds of ceramics were precisely observed by means of high-precision dilatometry coupled with mass spectroscopy, and then it was defined that the kinds of irradiation-induced crystalline defects and thermalstabilities, for silicon carbide, silicon nitride and SiAlON polymorphs.