The correlation of wear behaviors and microstructures of graphite-PTFE composites studied by positron annihilation

	The correlation of wear behaviors and microstructures of graphite-PTFE composites studied by positron annihilation
	Yan, FY; Wang WH(王文华); Wei L(魏龙); Wang, WH; Xue, QJ; Wei, L
刊名	JOURNAL OF APPLIED POLYMER SCIENCE
	1996
卷号	61 期号:7 页码:1231-1236
通讯作者	ACAD SINICA,INST HIGH ENERGY PHYS,LAB NUCL ANAL TECH,BEIJING 100080,PEOPLES R CHINA
英文摘要	The correlation between the wear behaviors of graphite-polytetrafluoroethylene (PTFE) composites and their macro- and microscopic structural changes was studied in a wide graphite volume content range of 0 to 50%. It was found that the macroscopic structure of graphite-PTFE composites changes from the state of PTFE-wrap-graphite to the state of detachment between PTFE and graphite powder along with an increase of graphite volume content. The sudden change occurred at the point of graphite volume content of about 40%. In this article the positron annihilation lifetime spectrum was used to detect the properties of microscopic imperfections. The results indicated that the changes of microimperfects of graphite-PTFE composites in size and in concentration are also related to the increase of graphite volume content while the crystallinity of PTFE shows a tendency to increase. The wear behaviors of graphite-PTFE composites corresponded to the physical properties of imperfects in a macro- and microscopic sense and were reflected fairly well by the interfacial properties between crystal and amorphous regions in PTFE. The positron annihilation technique is a useful tool for the study of tribological behaviors of polymers. (C) 1996 John Wiley & Sons, Inc.
学科主题	Polymer Science
类目[WOS]	Polymer Science
研究领域[WOS]	Polymer Science
原文出处	SCI
语种	英语
WOS记录号	WOS:A1996UY00200021
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/239212]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Yan, FY,Wang WH,Wei L,et al. The correlation of wear behaviors and microstructures of graphite-PTFE composites studied by positron annihilation[J]. JOURNAL OF APPLIED POLYMER SCIENCE,1996,61(7):1231-1236.
APA	Yan, FY,王文华,魏龙,Wang, WH,Xue, QJ,&Wei, L.(1996).The correlation of wear behaviors and microstructures of graphite-PTFE composites studied by positron annihilation.JOURNAL OF APPLIED POLYMER SCIENCE,61(7),1231-1236.
MLA	Yan, FY,et al."The correlation of wear behaviors and microstructures of graphite-PTFE composites studied by positron annihilation".JOURNAL OF APPLIED POLYMER SCIENCE 61.7(1996):1231-1236.