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	Relation of certain quantum chemical parameters to lubrication behavior of solid oxides
	Erdemir, A ; Li, SH ; Jin, YS
	2010-05-10 ; 2010-05-10
关键词	lubricious oxides solid lubrication electronegativity chemical hardness quantum chemistry tribochemistry ABSOLUTE ELECTRONEGATIVITY HARDNESS WEAR DITHIOPHOSPHATE CHEMISTRY TRIBOLOGY COATINGS FILMS Chemistry, Multidisciplinary
中文摘要	It is well-documented that certain oxides (such as Re2O7, B2O3, MoO3, V2O5, etc.) can provide friction coefficients of 0.1-0.3 to sliding surfaces at elevated temperatures and thus they are often referred to as lubricious oxides in the tribology literature. In a recently proposed crystal chemical model, Erdemir was able to establish a close correlation between the reported friction coefficients of such oxides and their ionic potentials [1]. In the present paper, we expand on this original concept and explore the relevance of two other quantum chemical parameters, electronegativity and chemical hardness, to the lubricity of solid oxides. These parameters have already been used by scientists to explain the nature of tribochemical interactions between various oil additives and sliding surfaces. It is conceivable that electronegativity and chemical hardness may also be strongly related to the extent of adhesive interactions and shear rheology of solid oxides and hence to their lubricity. The new results have confirmed that electronegativity, like ionic potential, is indeed a valid quantum chemistry parameter that can be used in predicting the lubrication behavior of solid oxides. Generally, the higher the electronegativity of the solid oxides is, the lower the friction coefficients will be. However, chemical hardness did not yield a similar trend. In light of these new findings, we propose some guidelines for the formulation of novel oxide or alloy systems that can lead to the formation of lubricious oxides at elevated temperatures. The findings of this study may pave the way for designer-based tribosystems in general and smart tribochemical systems in particular in future tribological applications such as dry machining.
语种	英语 ; 英语
出版者	MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL ; BASEL ; MATTHAEUSSTRASSE 11, CH-4057 BASEL, SWITZERLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/24585]
专题	清华大学
推荐引用方式 GB/T 7714	Erdemir, A,Li, SH,Jin, YS. Relation of certain quantum chemical parameters to lubrication behavior of solid oxides[J],2010, 2010.
APA	Erdemir, A,Li, SH,&Jin, YS.(2010).Relation of certain quantum chemical parameters to lubrication behavior of solid oxides..
MLA	Erdemir, A,et al."Relation of certain quantum chemical parameters to lubrication behavior of solid oxides".(2010).

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