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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。
The FGH96 superalloy powder was prepared by argon atomization method (AA method), the sieved powder was stored in vacuum and argon atmosphere, and the influence of storage conditions, storage time and powder characteristics on the oxygen content in the powder was studied , Analysis of aerosol superalloy oxidation properties. The results showed that the oxygen content of the powder showed a trend of increasing with the prolongation of storage time. The oxygen content of the powder under the vacuum was the most flat. After one month of storage, the oxygen content increased from 88.3 × 10-6 to 110 × 10- 6, suitable for longer storage time; under argon atmosphere, the storage effect of the powder in a short time is better, the storage effect declines with time, the oxygen content increases rapidly, and the storage reaches 137 × 10-6 in one month. The results of AES analysis showed that the segregation of components due to oxidation on the surface of powder and the pollution of carbon and oxygen were observed. Oxygen elements mainly formed oxides with elements such as Ti and Cr enriched on the surface, and the surface state of powder had a great influence on the oxidation characteristics of single powder , The coarser the surface of the powder, the more satellite particles adhered, the greater the oxygen content of the powder, the oxygen content of the powder first increased and then decreased, showing a Gaussian distribution, in which the maximum oxygen-enriched layer thickness was about 38 nm, the smoother the powder surface is, the less the oxygen content is. The oxygen content decreases monotonically along the depth profile, and the oxygen element is mainly physical adsorption.