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计算了 4J2 9可伐合金氧化生成不同产物的热力学上的氧化气氛条件。根据所计算的临界H2 /H2 O比值 ,在可控制的N2 /H2 /H2 O混合气氛下 ,对 4J2 9可伐合金进行氧化实验。氧化膜层的X射线衍射分析表明 ,通过加入H2 ,调整混合气氛的成分 (H2 /H2 O比 ) ,4J2 9可伐合金氧化可以得到以致密封接所需的Fe3O4 为主要成分的氧化物。同时氧化气氛的调整能够控制氧化物的生长 ,在 1 0 0 0℃下 4J2 9可伐合金氧化 1 5min得到的氧化膜厚度约为 0 .5 μm。
The thermodynamic oxidizing atmosphere conditions for 4J2 9 Kovar oxidation to different products were calculated. Based on the calculated critical H 2 / H 2 O ratio, oxidation experiments were carried out on the 4J2 9 Kovar alloy in a controlled mixed N2 / H2 / H2 O atmosphere. The X-ray diffraction analysis of the oxide film shows that by adding H2, the composition of the mixed atmosphere (H2 / H2O ratio), 4J2 9 Kovar oxidation can be obtained so as to seal the desired Fe3O4 oxide as the main component. At the same time, the adjustment of the oxidizing atmosphere can control the growth of the oxide. The thickness of the oxide film obtained by oxidation of 4K22 Kovar at 1500 K for 15 min is about 0.5 μm.