多组元掺杂对NiCoCrAlY氩气雾化粉末1200℃高温氧化行为的影响  

Effect of multi-component doping on high temperature oxidation behavior of NiCoCrAlY argon atomized powder at 1200℃

作　　者：任智强 尹轶川 王晓明 王文宇 朱胜[1] 韩国峰 REN Zhiqiang;YIN Yichuan;WANG Xiaoming;WANG Wenyu;ZHU Sheng;HAN Guofeng(National Key Laboratory for Remanufacturing,Army Academy of Armored Forces,Beijing 100072,China;School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]陆军装甲兵学院装备再制造技术国防科技重点实验室,北京100072 [2]南京理工大学材料科学与工程学院,南京210094

出　　处：《材料工程》2023年第10期59-67,共9页Journal of Materials Engineering

基　　金：国家重点研发资助项目(2018YFB1105800);国家社科基金项目(18BGL293)。

摘　　要：通过Nb,Hf和Ta元素复合添加改性,利用氩气雾化法制备NiCoCrAlYNbHfTa粉末,并与商用NiCoCrAlY粉末进行1200℃下24,48 h和72 h的氧化性能对比。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和X射线能谱仪(EDS)对粉末物相、微观结构和元素分布进行分析,通过等温氧化实验对比研究两种粉末的高温氧化性能。结果表明:所制备的粉末具有较好的球形度,球体中元素分布均匀。NiCoCrAlYNbHfTa粉末主要由β相和γ/γ′相组成,商用NiCoCrAlY粉末由γ/γ′相组成。NiCoCrAlYNbHfTa粉末能够快速形成致密的氧化铝膜,并且有效延缓Al的扩散与消耗,而商用NiCoCrAlY粉末在等温氧化后,Al消耗较快。两种粉末氧化增重曲线总体变化趋势较为接近,但商用NiCoCrAlY粉末经历的氧化初期时间较长,Al元素快速消耗殆尽。NiCoCrAlYNbHfTa粉末比商用粉末表现出更优的高温抗氧化性和抗高温烧结性能。NiCoCrAlYNbHfTa powders were prepared by using the argon gas atomization method through the composite modification of Nb,Hf and Ta elements.The oxidation performance of the prepared powders was compared with that of commercial NiCoCrAlY powder at 1200℃ for 24,48 h and 72 h.The phase,microstructure,and elemental distribution of the powders were analyzed using X-ray diffraction(XRD),scanning electron microscopy(SEM),and energy dispersive spectrometry(EDS).The isothermal oxidation experiments were conducted to compare the high-temperature oxidation performance of the two powders.The results indicate that the prepared powders have good sphericity,and the elemental distribution within the spheres is uniform.The NiCoCrAlYNbHfTa powders consist primarily of theβphase and theγ/γ′phases,and commercially available NiCoCrAlY powders are composed of theγ/γ′phase.NiCoCrAlYNbHfTa powder can rapidly form a dense oxide layer,effectively slowing the diffusion and consumption of Al.Conversely,commercial NiCoCrAlY powder consumes Al at a faster rate after isothermal oxidation.The two powders show similar overall trends in oxidation mass gain curves.However,commercial NiCoCrAlY powder has a longer initial oxidation period with rapid depletion of the Al element.In comparison with the commercial powder,the NiCoCrAlYNbHfTa powder exhibits superior high-temperature oxidation and anti-sintering performance.

关 键 词：NiCoCrAlY粉末 Nb Hf和Ta掺杂改性 1200℃高温氧化 氧化行为 

分 类 号：TF815[冶金工程—有色金属冶金] TG176[金属学及工艺—金属表面处理]