Abstract—

We have studied the desilicidation of Ti₃SiC₂ MAX phase powder at 1600°C in a CO + xSiO (x = 0, 1, 1.5, 2, 3) gas atmosphere. The required gaseous atmosphere was generated using granulated powder mixtures containing commercial carbon, TiO₂, SiO₂, and SiC, which released CO and SiO gases during heating as a result of oxide reduction reactions. Ti₃SiC₂ desilicidation was sensitive to the gas phase composition and occurred only if the CO : SiO ratio exceeded 1 : 3 (x < 3). The Ti₃SiC₂ desilicidation process was shown to be reverse of TiC silicidation with SiO gas and could be described by the following chemical reaction scheme: Ti₃SiC₂ + CO(g) = 3TiC + SiO(g).

中文翻译：

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在CO和SiO气氛中Ti 3 SiC 2 MAX相的脱硅

摘要-

我们已经研究了在CO + x SiO（x = 0、1、1.5、2、3）气体气氛中在1600°C下对Ti ₃ SiC ₂ MAX相粉末进行的脱硅处理。使用包含市售碳，TiO ₂，SiO ₂和SiC的粒状粉末混合物产生所需的气体气氛，所述混合物在加热期间由于氧化物还原反应而释放CO和SiO气体。Ti ₃ SiC _2的去硅化作用对气相成分敏感，并且仅在CO：SiO比率超过1：3（x <3）时才发生。Ti ₃ SiC ₂脱硅过程显示出与用SiO气体进行TiC硅化相反的过程，并且可以通过以下化学反应方案来描述：Ti ₃ SiC ₂ + CO（g）= 3TiC + SiO（g）。