Solidification characteristics of Pd40Ni40P20 alloy under microgravity condition

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	Solidification characteristics of Pd40Ni40P20 alloy under microgravity condition
	Liu, RP ; Sun, LL ; He, DW ; Zhang, XY ; Zhao, JH ; Qin, ZC ; Xu, YF ; Wang, WK
刊名	SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY
	1997
卷号	40 期号:6 页码:662
关键词	LIQUID
ISSN号	1006-9283
通讯作者	Liu, RP (reprint author), CHINESE ACAD SCI,INST PHYS,POB 603,BEIJING 100080,PEOPLES R CHINA.
中文摘要	We present photoelectron spectroscopic and low energy electron diffraction measurements of water adsorption on flat Si samples of the orientations (001), (115), (113), (5,5,12) and (112) as well as on curved samples covering continuously the ranges (001)-(117) and (113)-(5,5,12)-(112). On all orientations, water adsorption is dissociative (OH and H) and non-destructive. On Si(001) the sticking coefficient S and the saturation coverage Theta(sat) are largest. On Si(001) and for small miscuts in the [110]-azimuth, S is constant nearly up to saturation which proves that the kinetics involves a weakly bound mobile precursor state. For (001)-vicinals with high miscut angles (9-13 degrees), the step structure breaks down, the precursor mobility is affected and the adsorption kinetics changed. On (115), (113), (5,5,12) and (112), the values of S and Theta(sat) are smaller which indicates that not all sites are able to dissociate and bind water. For (113) the shape of the adsorption curves Theta versus exposure shows the existence of two adsorption processes, one with mobile precursor kinetics and one with Langmuir-like kinetics. On (5,5,12), two processes with mobile precursor kinetics are observed which are ascribed to adsorption on different surface regions within the large surface unit cell. From the corresponding values of S and Theta(sat), data for structure models are deduced. (C) 1997 Elsevier Science B.V.
收录类别	SCI
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/52741]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Liu, RP,Sun, LL,He, DW,et al. Solidification characteristics of Pd40Ni40P20 alloy under microgravity condition[J]. SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY,1997,40(6):662.
APA	Liu, RP.,Sun, LL.,He, DW.,Zhang, XY.,Zhao, JH.,...&Wang, WK.(1997).Solidification characteristics of Pd40Ni40P20 alloy under microgravity condition.SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY,40(6),662.
MLA	Liu, RP,et al."Solidification characteristics of Pd40Ni40P20 alloy under microgravity condition".SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY 40.6(1997):662.