论文标题
在高压下熔化和分解正常B6SI
Melting and decomposition of orthorhombic B6Si under high pressure
论文作者
论文摘要
使用原位电阻率测量和淬火，已经在最高8 GPA的压力下研究了原骨硼硅质B6SI的熔化。已经发现，在2.6-7.7 GPA范围内B6SI融化中，融化曲线的负斜率为-31（2）k/gpa，与固相相比，熔体密度更高。在非常高的温度下，B6SI熔体似乎不稳定，并且对富含硅和富含硼的硅化硅的融合率不符。不成比例的开始温度在很大程度上取决于压力，相应的低温边界表现为-92（3）k/gpa的负斜率，这表明B6SI熔体分解过程中体积显着降低。
Melting of orthorhombic boron silicide B6Si has been studied at pressures up to 8 GPa using in situ electrical resistivity measurements and quenching. It has been found that in the 2.6-7.7 GPa range B6Si melts congruently, and the melting curve exhibits negative slope of -31(2) K/GPa that points to a higher density of the melt as compared to the solid phase. At very high temperatures B6Si melt appears to be unstable and undergoes disproportionation into silicon and boron-rich silicides. The onset temperature of disproportionation strongly depends on pressure, and the corresponding low-temperature boundary exhibits negative slope of -92(3) K/GPa which is indicative of significant volume decrease in the course of B6Si melt decomposition.
