徐景阳
,
VANBRUSSELB.J.
,
NOORDHUISJ.
,
BRONSVELDP.M.
,
DEHOSSONJ.Th.M.
金属学报
Ne注入的AISI304奥氏体不锈钢的X射线衍射花样,显示出0.1μm注入薄层中的两种应变:由注入Ne引起的张应变和由高压Ne泡压迫周围点阵产生的压应变。本文介绍其测量原理和技术,在X射线衍射花样上还发现注入Ne引起马氏体相变现象。
关键词:
X射线衍射
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strain
,
implantation
,
martensitic transformation
,
null
Liping ZHENG Xiqing XIA Mingyao LI Shanghai Institute of Nuclear Research
,
Academia Sinca
,
Shanghai
,
201800
,
ChinaRisheng LI Lab.of Atomic Imaging of Solids
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
110015
,
China
材料科学技术（英文）
Correlations between surface composition changes and ion bombardment fluences were studied for multicomponent materials by using a dynamic Monte Carlo program,including the preferential sputtering and bombardment-induced Gibbsian segregation (BIGS) processes.For the case of 1 keV KR-~(10)B_(0.02)~(11)B_(0.08) (the most simple multicomponent material system),it is found that the ~(10)B composition enriches at the surface at low fluences but depletes at the surface at high fluences.For the case of 1 keV Ar-Pt_(0.5)Cu_(0.5).it is found that the Cu composition at the topmost surface is always under the bulk composition between zero and high fluences,but the evident composition gradient of Cu(the segregation species) exists in the surface at low fluences.The effects of the preferential sputtering and BIGS processes on above two surface composition profiles are also discussed.
关键词:
implantation
,
null
,
null
陈小文
,
蒋建平
,
陈洪
,
白新德
,
薛祥义
稀有金属材料与工程
利用MEVVA源对Zr-4合金分别进行1×1016 ions/cm2至1×1017ions/cm2剂量的铈离子与铌离子注入,比较了Ce/Nb离子注入对Zr-4合金氧化行为的影响.结果表明,铈离子注入可以较大程度地提高Zr-4合金的抗氧化性能,而铌离子注入则在一定程度上使Zr-4合金的氧化性能下降.GAXRD分析显示,铈离子注入促进了氧化锆由单斜相向六方相的转变,但铌离子注入却对氧化锆相的转变没有影响.并探讨了Ce/Nb离子注入影响Zr-4合金氧化行为的机理.
关键词:
锆-4合金
,
氧化行为
,
注入
,
相变
