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金属学报第30卷A辑1994年分类索引

金属学报第３０卷Ａ辑１９９４年分类索引金属学报第30卷A辑1994年分类索引....

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SCANNING TUNNELING MICROSCOPY OF (CrFe)_7C_3

WANG Jia jun , YANG Zhigang , LI Chunming , FANG Hongsheng (Tsinghua University , Beijing , China Manuscript received 1 December , 1994)

金属学报(英文版)

The microstructure of(CrFe)_7C_3 has been studied with scanning tunneling microscopy.It shows that a carbide consists of colonies which are full of stacking faults. The stacking faults in one colony are parallel while those in different colonies lie at angle with each other.

关键词: : scanning tunneling microscopy , null , null

SOLVENT EXTRACTION OF LANTHANIDES IN AQUEOUS NITRITE MEDIA BY CYANEX 302

YUAN Meng , LUO Aiqing , WANG Chun , LI Deqian (Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun. China Manuscript received 7 November , 1994)

金属学报(英文版)

Solvent extraction of trivalent lanthanides (except for Pm with Cyanex 302 [Bis (2,4,4-trimethylpentyl)monothiophosphinic acid] in heptane was studied at various aqueous pH values, extractant concentrations and different temperatures. Cyanex 302 shows pretty good behaviours on the extraction of lanthanides, especially when extracting heavy lanthanides. However,purified Cyanex 302 exhibits signi ficantly lower extractability to lanthanides than raw extractant. The roles ofdifferent components ofraw Cyanex 302 were discussed to understand the reason of good extractability of the raw extractant. The lanthanides extraction stoichiometry is discussed on the basis ofexperimental results, which can be expressed as follows:

关键词: : Bis(2 , null , null , null , null

1994年度高分子材料学科面上基金的申请和评审简况

材料研究学报

1994年度高分子材料学科面上基金的申请和评审简况1994年度高分子材料学科的面上项目的各项工作已于八月初基本完成.与L年度情况相比,申请项目总数由259项减到242项,其中高技术探索项目由ZI项增为26项,申请经费平均强度由8.16万元/项,增至8,74万元/项本年度共有90个单位申请,其中对个科学院或部门研究所申请54项,67所高等院校或所属研究所申请188项.按照“依靠专家,发挥民主,择优支持,公正合理”的评审方针,共述选了41项予以资?...

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HEAT CAPACITIES OF Fe_(40) Ni_(40) B_(20) GLASSY ALLOY MEASURED BY ENTHALPY METHOD

JIANG Qing , ZHAO Ming , LI Jianchen (Jilin University of Technology , Changchun , China Manuscript received 26 December , 1994)

金属学报(英文版)

The heat capacities (C_p) ofglassy and crystalline Fe_(40)Ni_(40)B_(20) alloy have been measured by means ofdifferential scanning calorimeter(DSC). A larger C_p value at the glass transition temperature (T_g) can be obtained. The reproducible C_p values ofrelaxed glass at certain heating rate are lower than that ofas quenched glass below 500 K, and are much higher at T_g than that of the crystal. The heating rate affects C_p values of the glass. At last, C_p val ues ofthe undercooled liquid are estimated.

关键词: : heat capacity , null , null , null

THEORETICAL DISCUSSION ON UNSTEADY FLOW OF FLUID DURING METAL ATOMIZATION

YANG Liushuan , YANG Gencang , ZHOU Yaohe (Northwestern Polytechnical University , Xi'an China Manuscript received 11 November , 1994)

金属学报(英文版)

The expressions of fluid velocity under several conditions during gas atomization according to the unsteady flow mechanics are propsed, and the basic ways to maintain the stability of fluid flow is analyzed

关键词: : gas atomization , null , null

ON SPINODAL BOUNDARIES OF Al-Li ALLOYS

WEI Yinghui , WANG Xiaotian (School of Materials Scince and Engineering , Xi'an Jiaotong University , Xi'an 710049 , China Manuscript received 10 Mareh , 1994)

金属学报(英文版)

The spinodal decomposition can occur in Al-Li alloys containing 5.8-14.2 at.% Li at room temperature. The modutated structure wavelength is approximately 3.1 nm for com mercial Al-LI alloys. The limit composition of the miscibility gap is 3.66 -16.06 at.%Li at 298 K. The highest temperature of the miscibility gap is 377 K.

关键词: : Al-Li alloy , null , null