Influences and Mechanisms of the Alloying Elements Ta and Ag on the Mechanical and Tribological Properties of Nickel-Base Alloys

doi:10.16078/j.tribology.2020163

	Influences and Mechanisms of the Alloying Elements Ta and Ag on the Mechanical and Tribological Properties of Nickel-Base Alloys
	Zhao, Gaopan 1,2; Zhang, Penglin 2; Wang, Wenzhen 1; Yi, Gewen 1
刊名	Mocaxue Xuebao/Tribology
	2021-05-01
卷号	41 期号:3 页码:393-403
关键词	Alloying elements Alumina Aluminum oxide Ball milling Chromium alloys Chromium metallography Coalescence Fracture Hot pressing Lubricant films Mechanical properties Molybdenum alloys Molybdenum metallography Nickel alloys Nickel metallography Scanning electron microscopy Silver Silver alloys Silver metallography Sintering Tantalum alloys Tribology Wear of materials Dispersion strengthening Fracture mechanisms High-energy ball milling Increasing temperatures Intermediate temperatures Mechanical and tribological properties Nickel-based composites Wide temperature ranges
ISSN号	10040595
DOI	10.16078/j.tribology.2020163
英文摘要	Nickel-based composites with addition of Ta and Ag were prepared by high-energy ball milling and vacuum hot-pressing (HP) sintering methods. The tribological and mechanical properties of the composites in a wide temperature range were investigated. The phase composition, wear mechanism and fracture mechanism were analyzed by scanning electron microscopy and X-ray diffraction. During the HP sintering process, Ta reacted with C in the graphite die and formed a TaC ceramic phase which dispersed in the matrix. The addition of Ta and Ag reduced the friction and wear of the material, and the NiCrMoAl-Ta-Ag composite achieved continuous lubrication from room temperature to 800 . Ag provided lubrication at room temperature, and discrete lubricant film was formed by abrasive debris and Ag at intermediate temperature, while at 800 , a continuous lubricant film containing oxide, silver molybdate and Ag was formed on the worn surface. The addition of Ta significantly enhanced the mechanical properties of the material. The NiCrMoAl-Ta alloy had excellent mechanical properties in wide temperature range (room temperature ~ 1 000 ), which was attributed to the dispersion strengthening effect of the in-situ generated TaC and Al2O3 ceramic phase. The fracture mechanism of the materials varied from micro-void coalescence fractures to the fracture combining micro-void coalescence and oxidative fractures with increasing temperature. Copyright ©2021 Tribology. All rights reserved.
语种	中文
出版者	Science Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150936]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou; 730000, China; 2.School of Materials Science and Engineering, State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhao, Gaopan,Zhang, Penglin,Wang, Wenzhen,et al. Influences and Mechanisms of the Alloying Elements Ta and Ag on the Mechanical and Tribological Properties of Nickel-Base Alloys[J]. Mocaxue Xuebao/Tribology,2021,41(3):393-403.
APA	Zhao, Gaopan,Zhang, Penglin,Wang, Wenzhen,&Yi, Gewen.(2021).Influences and Mechanisms of the Alloying Elements Ta and Ag on the Mechanical and Tribological Properties of Nickel-Base Alloys.Mocaxue Xuebao/Tribology,41(3),393-403.
MLA	Zhao, Gaopan,et al."Influences and Mechanisms of the Alloying Elements Ta and Ag on the Mechanical and Tribological Properties of Nickel-Base Alloys".Mocaxue Xuebao/Tribology 41.3(2021):393-403.