Mo5Si3-20%Al2O3p复相陶瓷的制备及摩擦磨损性能
薛茂超;张红霞;陈辉
【期刊名称】《机械工程材料》 【年(卷),期】2017(041)010
【摘要】Mo5Si3 cermet and Mo5Si3 -20wt%Al2O3p ceramic composite were prepared by mechanical milling and hot-pressing sintering.And then the microstructure,mechanical and friction-wear properties were analyzed
by
using
X-ray
diffractometer,scanning
electron
microscopy,hardness tester,friction-wear testing machine,etc.The results show that the Mo5Si3 -20wt% Al2O3p ceramic composite was mainly composed of Mo5Si3 ,Al2O3 and few Mo3Si phases.The relative density,hardness and fracture toughness of the ceramic composite were higher than those of the single-phase Mo5Si3 cermet.Furthermore, the friction coefficient and wear rate of the ceramic composite were lower and the changing of friction coefficient with the time was smoother,showing a better friction and wear resistance.When grinding with GCr15 steel ball,the main wear mechanism of the Mo5Si3 cermet was adhesive wear and spalling fatigue,while that of Mo5Si3 -20wt%Al2O3p ceramic composite was abrasive wear.Both had an oxidation wear.%采用机械球磨/热压烧结法制备了Mo5Si3金属陶瓷和Mo5Si3-20%(质量分数,下同)Al2O3p复相陶瓷,利用X射线衍射仪、扫描电子显微镜、硬度计和摩擦磨损试验机等分析了其微观结构、力学性能和摩擦磨损
性能.结果表明:Mo5Si3-20%Al2O3p复相陶瓷的主要物相为Mo5Si3、Al2O3和少量Mo3Si;复相陶瓷的相对密度、硬度和断裂韧性均高于单相Mo5Si3金属陶瓷的,且其摩擦因数和磨损率较低,摩擦因数随时间的变化较平缓,表现出更好的摩擦磨损性能;与GCr15钢球对磨时,Mo5Si3金属陶瓷的主要磨损机制为黏着和疲劳剥落,Mo5Si3-20%Al2O3p复相陶瓷的则为磨粒磨损,二者同时存在氧化磨损.
【总页数】5页(24-27,32)
【关键词】Mo5Si3-Al2O3p复相陶瓷;磨损性能;磨损机理 【作者】薛茂超;张红霞;陈辉
【作者单位】新乡职业技术学院机械制造系,新乡 453006;新乡职业技术学院材料工程系,新乡 453006;聊城大学材料科学与工程学院,聊城 252000 【正文语种】中文 【中图分类】TG146.4 【文献来源】
https://www.zhangqiaokeyan.com/academic-journal-cn_materials-mechanical-engineering_thesis/0201212426271.html 【相关文献】
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Mo5Si3-20%Al2O3p复相陶瓷的制备及摩擦磨损性能
