检索结果-南通市图书馆

Determination of Neutron Irradiation-Induced Phosphorus Segregation on Grain Boundaries in a P-doped 2.25Cr1Mo Steel

在线全文

学校读者我要写书评

暂无评论

引用

Journal of Materials Science & Technology 2004年第1期20卷 81-85页

作者： ShenhuaSONG R.G.Faulkner P.E.J.Flewitt DongdongSHEN JingLIU ZexiYUAN SchoolofMaterialsandMetallurgy WuhanUniversityofScienceandTechnologyWuhan430081China instituteofpolymertechnologyandmaterialsengineering LoughboroughUniversityLoughboroughLeicestershireLEll3TUUK BerkeleyCentre BNFLMagnoxGenerationBerkeleyGloucestershireGL139PBUK

Irradiation-induced impurity segregation to grain boundaries is one of the important radiation effects on materials. For this reason, phosphorus segregation to prior austenite grain boundaries in a P-doped 2.25Cr1Mo steel subjected to neutron irradiation is examined using field emission gun scanning transmission electron microscopy (FEGSTEM) with energy dispersive X-ray microanalysis (EDX). The steel samples are irradiated around 270 and 400℃, respectively. The irradiation dose rate and dose are -1.05×10-8 dpa/s and -0.042 dpa respectively for 270℃ irradiation, and 1.7×10-8 dpa/s and 0.13 dpa respectively for 400℃ irradiation. The FEGSTEM results indicate that there is no apparent phosphorus segregation during 270℃ irradiation but there is some during 400℃ irradiation.

关键词： Neutron irradiation Segregation Grain boundary Phosphorus

Modelling of Equilibrium Grain Boundary Solute Segregation under Irradiation

在线全文

学校读者我要写书评

暂无评论

引用

Journal of Materials Science & Technology 2005年第2期21卷 196-200页

作者： ShenhuaSONG R.G.Faulkner P.E.J.Flewitt LuqianWENG DivisionofMaterialsScienceandEngineering ShenzhenGraduateSchoolHarbinInstituteofTechnologyShenzhenUniversityTownXiliShenzhen518055China instituteofpolymertechnologyandmaterialsengineering LoughboroughUniversityLoughboroughLeicestershireLEll3TUUK InterfaceAnalysisCentre UniversityofBristolBristolBS28BSUK

Both radiation-induced excess vacancies and solute-interstitials may enhance solute diffusion. The radiation-enhanced solute diffusion promotes the kinetic process of equilibrium segregation. This effect is especially considerable in the low temperature range. As a complement to modelling of radiation-induced non-equilibrium segregation, the radiation-created vacancy and solute-interstitial-accelerated equilibrium grain boundary solute segregation were theoretically treated. The models were applied to phosphorus segregation in α-Fe subjected to neutron irradiation.

关键词： Radiation Point defects Diffusion Grain boundary Segregation

在线全文

学校读者我要写书评

暂无评论

硅烷偶联剂在高填充白炭黑轮胎胶料中的应用

引用

轮胎工业 2001年第6期21卷 357-360页

作者： Ansarifar M A Nijhawan R 涂学忠 instituteofpolymertechnologyandmaterialsengineering

制备沉淀法白炭黑的工艺有多种,例如水溶性硅酸盐沉淀和硅酸钠溶液与硫酸反应.白炭黑表面有硅烷和硅醇化学官能团,硅醇或羟基基团是酸性的.此外,由于这种填料表面是极性和亲水的,因此有强烈的吸潮性.

关键词：硅烷偶联剂高填充白炭黑轮胎胶料应用