Radiation Damage in Diamond and Silicon Carbide
Radiation Damage in Diamond and Silicon Carbide
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金刚石和碳化硅的辐射损伤
DOI：
10.1103/physrev.103.1184
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发表时间：
1956
期刊：
影响因子：
--
通讯作者：
P. Day
中科院分区：
文献类型：
--
作者：
W. Primak;L. Fuchs;P. Day
金刚石和碳化硅在核反应堆中受到辐照，发现其受损方式与石墨相似。详细观察了膨胀和能量含量的增加及其退火。观察到膨胀高达约3.7%，能量含量增加高达约400 cal/g。的结晶和能量含量（存储的能量的释放）似乎退火在一个平行的方式，可以被视为一个过程中的活化能分布动力学。金刚石的初始分布显示出在约1.6ev处的峰和延伸至超过3.7ev的活化能的平台（在短照射下在峰的高度的约1/4处，并且对于长照射而言在更大的比例处）。碳化硅的初始分布在约1.6ev处显示出较小的窄峰，并且在约3.4ev处显示出从约2.2ev延伸至4.3ev的非常宽的较大峰。在许多辐照金刚石样品中，储存的能量在一定温度范围内超过热容，并且在加热时观察到灾难性的储存能量释放。
Diamond and silicon carbide were irradiated in nuclear reactors and were found to be damaged in a manner similar to that for graphite. Detailed observations were made of the dilatation and increase in energy content and their annealing. Dilatations as great as about 3.7 percent and increases in energy content as great as about 400 cal/g were observed. The dilatations and the energy content (release of stored energy) seemed to anneal in a parallel manner and could be treated kinetically as a distribution of processes in activation energy. The initial distribution for diamond showed a peak at about 1.6 ev and a plateau extending (at about ¼ the height of the peak at short irradiations and greater proportionately for long irradiations) to activation energies in excess of 3.7 ev. The initial distribution for silicon carbide showed a smaller narrow peak at about 1.6 ev and a very broad larger peak extending from about 2.2 ev to 4.3 ev with a maximum at about 3.4 ev. In many of the samples of irradiated diamond the stored energy exceeded the heat capacity in certain temperature ranges, and catastrophic stored energy release was observed on heating.