| 引用本文: | 常宇宏,贾成厂.机械合金化与放电等离子烧结制备Fe-Fe3Al材料[J].材料科学与工艺,2012,20(2):90-95.DOI:10.11951/j.issn.1005-0299.20120217. |
| CHANG Yu-hong,JIA Cheng-chang.Fe-Fe3Al materials prepared by mechanical alloying and spark plasma sintering[J].Materials Science and Technology,2012,20(2):90-95.DOI:10.11951/j.issn.1005-0299.20120217. |
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| 摘要: |
| 为开发新型金属材料,采用机械合金化与放电等离子烧结的方法制备Fe-Fe3Al合金.根据Fe-Al二元相图与研究经验,对成分及工艺进行优化设计.用X射线衍射仪(XRD)对成分进行了定性分析,用扫描电子显微镜(SEM)观察了样品的表面与断口形貌,进行了能谱分析,并测试了致密度、显微硬度(HV)及抗弯强度、抗拉强度等力学性能.结果表明:对粉末进行预球磨,并在球磨前后对粉末进行搅拌混合处理,能更好地促使Fe与Al在高能球磨的过程中反应；经放电等离子烧结能够制备出Fe3Al/Fe两相材料,相对密度为99%以上,硬度为HV561,抗弯强度1426 MPa,抗拉强度640 MPa,力学性能优于文献报道的值. |
| 关键词: Fe-Fe3Al 机械合金化 放电等离子烧结 力学性能 |
| DOI：10.11951/j.issn.1005-0299.20120217 |
| 分类号:TG14；TF123 |
| 基金项目:国家自然基金资助项目(50575147)；上海市教委重点资助项目(J50503). |
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| Fe-Fe3Al materials prepared by mechanical alloying and spark plasma sintering |
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CHANG Yu-hong1,2, JIA Cheng-chang1,2
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1.School of Material Science and Engineering,University science and technology Beijing,Beijing 100083,China;2.Powder Metallurgy Institute,University science and technology Beijing,Beijing 100083,China
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| Abstract: |
| Fe-Fe3Al alloys were prepared by mechanical alloying and spark plasma sintering in order to develop new materials.The ingredients and process parameters were optimized according to Fe-Al binary phase diagram and our research experiences.Qualitative analysis of the composition was accomplished by X-ray diffraction (XRD),the sample surface and fracture morphology were observed by scanning electron microscopy (SEM),and the mechanical properties such as relative density,hardness (HV),bending strength and tensile strength were tested.The results show that pre-milling and stirring of the powder before mechanical alloying can promote the reaction of Fe and Al in high-energy ball milling process.Fe3Al/Fe two-phase materials can be prepared by spark plasma sintering,relative density is higher than 99%,its Vickers hardness is HV 561,bending strength is 1426 MPa,tensile strength is 640 MPa,the mechanical properties superior to the values reported in the references. |
| Key words: Fe-Fe3Al mechanical alloying spark plasma sintering mechanical properties |
