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本文采用真空蒸镀和离子镀法,在日本NICALON碳化硅纤维上进行纯铝、铝—1％硅合金单层镀和氧化硅-纯铝双层镀,制成SiC/Al、SiC/Al-Si和SiC/SiO_2/Al复合体,将这些复合体分别在真空中进行热处理,然后用浸蚀剂除去镀层,把萃取出的纤维试样放在室温下进行拉伸试验,根据纤维强度的变化,评价硅和氧化硅涂层对碳化硅纤维与铝相容性的影响。实验证明,当用SiO_2或Al—1％Si合金作纤维涂层时,在680℃或720℃真空热处理后,纤维拉伸强度的下降均有所减缓。
In this paper, pure aluminum, aluminum-1% silicon alloy single-layer plating and silicon oxide-pure aluminum double plating on NICALON silicon carbide fibers in Japan were made by vacuum deposition and ion plating. SiC / Al, Si and SiC / SiO 2 / Al composites, respectively, these composites are respectively subjected to a heat treatment in a vacuum, and then the coating is removed with an etchant. The extracted fiber samples are subjected to a tensile test at room temperature, , To evaluate the effect of silicon and silicon oxide coatings on the compatibility of silicon carbide fibers with aluminum. Experiments show that when using SiO_2 or Al-1% Si alloy fiber coating, after 680 ℃ or 720 ℃ vacuum heat treatment, the decrease of fiber tensile strength has slowed down.