摘要
本文首先利用金属元素粉末球磨后通过放电等离子烧结制备了Ti-11Fe-3Nb-3Mn-3Sn (at.%)钛合金。同时在球磨后的元素粉末中加入10 wt.%的FeCoCrNiMo0.15 (at.%)高熵合金颗粒通过放电等离子烧结制备了高熵合金颗粒增强的钛基复合材料。本文对两种材料在室温条件下进行了往复式滑动摩擦磨损试验,利用场发射扫描电子显微镜、显微硬度测试仪和超景深三维轮廓仪等设备对加入高熵合金颗粒前后的钛合金样品及其摩擦磨损行为进行了研究和对比。结果表明:在钛合金中加入高熵合金颗粒增强后,高熵合金颗粒增强钛合金硬度得到提高。高熵合金颗粒外层与钛合金形成一定厚度的扩散层,加入高熵合金颗粒后的钛合金耐磨性能提高明显。Ti-11Fe-3Nb-3Mn-3Sn合金与高熵颗粒增强后的Ti-11Fe-3Nb-3Mn-3Sn合金的磨损机制主要为粘着磨损,磨粒磨损和少量的塑性变形。
In this paper, Ti-11Fe-3Nb-3Mn-3Sn (at.%) alloys was prepared by the spark plasma sintering (SPS) method using elemental powders after ball-milling. And then the 10 wt.% FeCoCrNiMo alloy particles was mixed with the elemental powders after ball-milling to obtain high-entropy alloy particles reinforced Ti-11Fe-3Nb-3Mn-3Sn (at.%) alloy composite by the same SPS method. The wear behaviors of Ti-11Fe-3Nb-3Mn-3Sn (at.%) alloy and its composite were investigated by re-ciprocating sliding wear tests at the room temperature. Field emission scanning electron micro-scope, microhardness tester and 3D optical surface profiler were employed to study the micro-structures and wear behaviors. The results showed that: the hardness and wear resistance of the high-entropy alloy reinforced titanium alloy was improved significantly after the addition of high-entropy alloy particles. A diffusion layer with a certain thickness was formed between the particles and titanium alloy matrix. The wear mechanism of Ti-11Fe-3Nb-3Mn-3Sn and its compo-site is mainly adhesive wear, abrasive wear and some plastic deformation.
出处
《材料科学》
2018年第10期1007-1015,共9页
Material Sciences
基金
国家自然科学基金(项目号:51604112)
湖南省自然科学基金(项目号:2017JJ3089)
湘潭市企业科技特派员项目(项目号:CXY-TPZJ20181017)
湖南科技大学大学生研究性学习和创新性实验计划项目(项目号:201710534013)的资助。
