从热力学和动力学方面对Nicalon SiC纤维与Al的化学反应进行了研究,探讨了反应机理及合金元素的影响.实验表明,从953K开始就发生SiC纤维和Al之间的反应.其反应符合抛物线规律;在1013K和1033K反应速率常数分别为3.30×10~(-8)m·s~(-1/2)和3.85×10~(-8)m·s~(-1/2).Mg,Cu和Mn等合金元素的共同作用会加剧其反应.
The interface reaction between Nicalon SiC fibre and Al has beeninvestigated. The reaction occurs at the temperatures above 953 K and the reactionrate was found to be consistent with the parabola rule. The reaction rate constantsare 3.3×10~(-8) and 3.85×10~(-8)m·s~(-1/2) at 1013 and 1033 K respectively. Addition ofCu, Mg and Mn will cause the reaction to proceed severely.
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