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¼ÅįÇã³Ç(½ð±Ò+10, ·ÒëEPI+1): 2011-03-05 20:14:35
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Each of the lines in Figs. 4£¨a£© and 4(b) becomes a plane in£¨¦ÌN£¬¦ÌTa£©space. Considering the planes corresponding to the structures with the lowest energy for a given £¨¦ÌN,¦ÌTa£©, we obtain the phase diagram shown in Fig. 4(c).ͼ4aºÍbÖеÄÏßÔÚ£¨¦ÌN£¬¦ÌTa£©¿Õ¼äÐγÉÒ»¸öÆ½Ãæ¡£ÔÚ¸ø¶¨µÄ£¨¦ÌN£¬¦ÌTa£©£¬Æ½ÃæÓë¾ßÓÐ×îµÍÄÜÁ¿µÄ½á¹¹Ïà¹ØÁª£¬ÎÒÃÇ»ñµÃÁËÈçͼ4cËùʾµÄÏàͼ¡£ The unshaded region corresponds to that where there are no stable or metastable structures; i.e., all are unstable.δ»ÒõÓ°µÄÇøÓòÓëÎÞÎÈ̬»ò°ëÎÈ̬½á¹¹²¿·ÖÏà¹Ø£¬Ò²¾ÍÊÇ˵¶¼ÊDz»Îȶ¨µÄ¡£ As suggested by Figs.4(a) and 4(b), the Ta5N6 phase dominates the phase diagram,with only two other phases being stable: namely, Ta2N for low values of mN and high values of mTa, and Ta3N5 for the opposite extremes.ͼ4aºÍbÌáʾ£¬Ta5N6ÏàÖ÷µ¼ÁËÏàͼ£¬Í¬Ê±Ö»ÓÐÆäËüÁ½¸öÎȶ¨µÄÏࣺµÍmNÖµ¡¢¸ßmTaÖµµÄTa2NºÍÊýֵΪÏà·´¼«¶ËµÄTa3N5¡£ |
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