采用氩气雾化法(AA法)制备出FGH96高温合金粉末,将筛分后的粉末在真空和氩气保护下存储,对储存条件、储存时间以及粉末特性对粉末中氧含量的影响进行研究,分析气雾化高温合金粉末的氧化特性.结果表明,随着储存时间的延长,粉末中的氧含量均呈现增长趋势,真空下粉末的氧含量变化曲线最趋平缓,储存一个月,氧含量由88.3×10(-6)增加至110×10(-6),适合做较长时间的储存;氩气气氛下,短时间内粉末的储存效果较好,随着时间延长储存效果下降,氧含量增长较快,储存一个月达到137×10(-6).AES分析结果表明粉末表面存在氧化造成的成分偏析以及碳、氧元素污染,氧元素主要与富集表面的Ti,Cr等元素生成氧化物,粉末表面状态对单个粉末的氧化特性有较大的影响,粉末表面越粗糙,粘附的卫星颗粒越多,粉末的氧含量越大,粉末的氧含量呈现先增加后减小的趋势,表现为高斯分布,其中氧的富集层厚度最大约为38 nm,粉末表面越光滑则氧含量越少,氧含量沿深度分布曲线表现为单调减小,氧元素以物理吸附为主.
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