谢锐,吕铮,徐长伟,刘波,刘春明

• 1:沈阳建筑大学材料科学与工程学院
• 2:东北大学材料科学与工程学院材料各向异性与织构教育部重点实验室

摘要(Abstract)：

采用机械球磨的方式制备了Fe-9Cr-1.5W-3Y_2O_3和Fe-9Cr-1.5W-3Zr-3Y_2O_3合金粉,并对其进行了真空等温热处理。利用X射线散射(X-ray diffraction, XRD)、X射线吸收精细结构谱(X-ray absorption fine structure, XAFS)、小角度X射线散射(small angle X-ray scattering, SAXS)等分析了球磨及真空等温热处理不同时间后合金中析出相的变化情况,同时测量了合金的硬度。XRD实验结果表明当合金中添加锆元素后,除铁素体衍射峰外热处理过程中还形成了ZrO_2相及Y_4Zr_3O_(12)相,而在不含锆元素的合金中只检测到Cr_2O_3相的存在。XAFS实验结果表明当添加锆元素后,合金的XAFS曲线发生改变,不同于纯钇元素及纯氧化钇样品。SAXS实验结果说明含锆元素的合金经1100℃真空等温热处理1 h后,其氧化物析出相的分布密度最高,为9.27×10~(21)/m~3。无论合金化学成分如何变化,球磨后合金的硬度最高,添加锆元素后有利于提高合金的硬度。

关键词(KeyWords)： 氧化物弥散强化合金;锆元素;X射线吸收精细结构谱;小角度X射线散射

Abstract:

Keywords:

基金项目(Foundation): “辽宁省‘兴辽英才计划’项目资助”(XLYC1902103);; 国家自然科学基金青年基金(51601031)

作者(Author): 谢锐,吕铮,徐长伟,刘波,刘春明

DOI: 10.13289/j.issn.1009-6264.2020-0511

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