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Acta Metallurgica Sinica(English letters) 2002年第4期15卷 375-379页

作者： h.yu,y.l.kang,h.b.dong,d.l.liu and j.fuuniversity of science and technology beijing, beijing 100083, china manuscript received 10 october 2001 in revised form 25 january 2002 Univ. of Sci. and Technol. beijing Beijing 100083 China

This paper investigated the mechanism of precipitation and its influence upon prop-erties of ultra-thin hot strips of low carbon steel produced by CSP techniques using experiment and thermodynamics theory. The experimental results show that there are lots of fine and dispersive precipitates in microstructures. by analysis, most of aluminum nitrides are in grains, while coexisted precipitates of MnS are along grain boundaries. Coexisted precipitates compose cation-vacancy type oxides such as Al2O3 in the core, while MnS is at the fringe of surface. The precipitation behavior of AIN and MnS in the hot strip is studied by thermodynamic calculation. At last, implica-tions between strengthening effect and techniques are analyzed using obtained solubility products.

关键词： CSP precipitation thermodynamics strengthening

Stress in Thin Films; diffraction Elastic Constants and Grain Interaction

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journal of Materials science & technology 2002年第2期18卷 121-124页

作者： U.Welzel, M.leoni, P.lamparter and E.j.MittemeijerMax Planck Institute for Metals Research, Seestrasse 92, d-70174 Stuttgart, Germany [ manuscript received october 17, 2001] Max Planck Inst. for Metals Res. Seestrasse 92 D-70174 Stuttgart Germany

Untextured bulk polycrystals usually possess macroscopically isotropic elastic properties whereas for most thin films transverse isotropy is expected, owing to the limited dimensionality. The usually applied models for the calculation of elastic constants of polycrystals from single crystal elastic constants (so-called grain interaction models) erroneously predict macroscopic isotropy for an (untextured) thin film. This paper presents a summary of recent work where it has been demonstrated for the first time by X-ray diffraction analysis of stresses in thin films that elastic grain interaction can lead to macroscopically elastically anisotropic behaviour (shown by non-linear sin2ψ plots). A new grain interaction model, predicting the macroscopically anisotropic behaviour of thin films, is proposed.

关键词： Thin film Elastic constant Grain interaction X-ray diffraction

在Si(111)上用有机溶胶凝胶甩膜热解法制备(0001)定向的6h-SiC薄膜

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物理学报 2001年第2期50卷 256-261页

作者：王玉霞郭震何海平曹颖汤洪高中国科学技术大学材料科学与工程系合肥230026

在Si(111)衬底上用聚苯乙烯溶胶凝胶甩膜并经 95 0℃真空 (10 -3 Pa)热解处理法 ,制备出晶态SiC薄膜 .用FTIR ,XRd ,TEM ,RamanXPS等方法研究了SiC薄膜的晶体结构、微结构、组成以及各元素的化学态等性质 .结果表明制得的是沿 (0 0 0... 详细信息

在Si(111)衬底上用聚苯乙烯溶胶凝胶甩膜并经 95 0℃真空 (10 -3 Pa)热解处理法 ,制备出晶态SiC薄膜 .用FTIR ,XRd ,TEM ,RamanXPS等方法研究了SiC薄膜的晶体结构、微结构、组成以及各元素的化学态等性质 .结果表明制得的是沿 (0 0 0 1)高度择优取向的晶态 6h SiC薄膜 .膜中SiC晶粒沿c轴柱状生长 ,其最大尺寸约 15 0nm ,膜厚约为 0 3μm ,SiC中的Si/C比约为 1.表层有少许污染C(Ch和CO)和少量O(Si2 O3,CO态氧和吸附氧 ) .从对比实验可知 ,在热解时将甩膜的Si片与另一空白Si片面面相贴可明显增加SiC的生成量 .

关键词：碳化硅薄膜溶胶凝胶甩膜热解法

behavior of Zr-Rich Phase in a Cast NiAl-33.5Cr-0.5Zr Alloy during heat Treatment

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journal of Materials science & technology 2001年第6期17卷 629-632页

作者： hui lI, sjianting GUQ, Wanhui lAI and Shuhe WANG Institute of Metal Research, Chinese Academy of sciences, Shenyang 110016, china [manuscript received july 7, 2000, in revised form october 11, 2000] Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China

There are many Zr particles in as-cast NiAl-33.5Cr-0.5Zr (at. pct) alloy, which usually exist at the edge of eutectic of beta -NiAl and cx-Cr. After air and furnace cooling solution treatments, far 1400 degreesC, 2 h and 1450 degreesC, 1 h, pure Zr phase remains in the furnace cooling (F.C.) state alloys and Ni2AlZr phase forms in the air cooling (A.C.) state alloys. during solution treatment at 1450 degreesC, bulk and 'fish bone' shape Zr-rich phases form respectively in F.C. and A.C. state alloys. A 'river' shape Ni2AlZr phase forms after 1450 C for 1h F.C. and 850 degreesC for 12 h, F.C.. The alloy has less pure Zr and Ni2AlZr phase after 1400 degreesC with both air and furnace cooling followed by 850 C and 950 C for 12 h, F.C. aging treatments, respectively. Additionally, there is a ternary eutectic of NiAlZr and a phase enriched Zr and Cr forms at the edge of the eutectic of beta -NiAl and alpha -Cr in the alloy treated at 1400 degreesC, 2 h, F.C. and 950 degreesC, 12 h, F.C.

关键词： NiAl Zr behavior of Zr-Rich Phase in a Cast NiAl-33.5Cr-0.5Zr Alloy during heat Treatment Cr Cast