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DESIGN AND PREPARATION OF SILICON NITRIDE COMPOSITE WITH HIGH FRACTURE TOUGHNESS AND NACRE STRUCTURE

Y Huang , H.N Hao , Y.L. Chen and B.L.Zhou (1)Department of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China 2)Institute of Metal Research , Chinese Academy of Sciences , Shenyang 110015 , China Manuscript received 26 August 1996)

金属学报(英文版)

A new way of designing and preparing silicon nitride ceramic composite with high fracture toughness and nacre structure has been proposed. To mimic the laminated structure of nacre, Si_3N_4 matrix ceramic layer can be obtained through compacting rolling method. To mimic the secondary toughening of n...

关键词: :secondary toughening , null , null , null

ELECTRONIC STRUCTURE OF Pd-Y-Si GLASSES

LUO Meiqing CHEN Nianyi Shanghai Institute of Metallurgy , Academia Sinica , Shanghai , ChinaYU Zhizhong Shanghai Institute of Testing Technics , Shanghai , ChianNING Yuantao ZHOU Xinming Kunming Institute of Precious Metals , Kunming , China CHEN Nianyi , Professor , Shanghai Institute of Metallurgy , Academia Sinica , Shanghai 200050 , China

金属学报(英文版)

The electronic structure of Pd-Y-Si glass has been investigated by ESCA and quantum chem- ical calculation.It was found that the valence electrons of Y transferred to Si atoms in this metallic glass,forming polar covalent bonds.Perhaps th...

关键词: Pd-Y-Si glass , null , null , null

SOLUBILITIES OF Ce,Nd AND Y IN α-Fe

LI Laifeng XING Zhongshu Institute of Metal Research , Academia Sinica , Shenyang , China XING Zhongshu , professor , Institute of Metal Research , Academia Sinica , Shenyang 110015 , China

金属学报(英文版)

The solubilities of Ce,Nd and Y in α-Fe at 873 to 1153 K have been deter mined by means of electron microprobe quantitative analyses.The temperature dependences of the solubilities were obtained from the experimental data.The results have been compared with those deter...

关键词: α-Fe , null , null , null , null

沸石Y用于组装纳米CdS

翟庆洲 , 蔡建岩 , 于淼

稀有金属材料与工程

以沸石Y及以甲基三甲氧基硅烷对沸石Y进行表面改性后的Y(m)沸石作主体,用离子交换法制备Cd-

关键词: Y沸石 , Y改性沸石 , 甲基三甲氧基硅烷 , 纳米CdS , 主-客体纳米复合材料 , 表征

Microstructure Formation and Mechanical Property Involving Icosahedral Quasicrystal Phase of Y Rich Mg-Zn-Y Quasicrystal Alloy

D.Q. Wan , G.C. Yang

金属学报(英文版)

The microstructure formation and mechanical property involving icosahedral quasicrystal (I-phase) in the Y-rich Mg-Zn-Y alloy have been studied. The equilibrium formation of I-phase from the Y-rich Mg-Zn-

关键词: Mg-Zn-Y , null , null

EFFECT OF Y ON MECHANICAL PROPERTIES OF Fe-20Cr-4Al-Y ALLOY

LI Bei WU Shuangxia MENG Guang'en JIANG Liping PANG Wenjie Baotou Research Institute of Rare Earth , Baotou , China Baotou Research Institute of Rare Earth , P.O.Box 131 , Baotou 014010 , China

金属学报(英文版)

With the increase of Y content in the Fe-20Cr-4AI-Y alloy,the uniform deformability of tensile specimens was found to be slightly decreased,as well as,the fracture strength and re- duction after necking remarkably dropped.This seems to be...

关键词: Fe-Cr-A1 alloy , null , null

THE　EFFECTS　OF　Y,Zr　AND　Si　ADDITIONS　ONCYCLICOXIDATIONBEHAVIOUROFFeAlINTERMETALLICS

腐蚀学报（英文）

研究了Y、Zr、Si对FeAl金属间化合物在1000～1200℃下循环氧化性能的影响,并用X射线衍射、扫描电镜及能谱分析等手段分析了氧化产物。结果表明,Y、Zr、Si的加入大大...

关键词: FeAl金属间化合物 , null , null

Au-Ag-Y三元系富Au-Ag区域(Y≤34at%)的700℃等温截面

张康侯 , 陈亮维 , 尹俊美 , 陈藜莉 , 谢明 , 符世继

贵金属 doi:10.3969/j.issn.1004-0676.2008.04.001

在Au-Ag、Au-Y和Ag-Y二元合金相图的基础上,采用X-射线衍射分析、电子探针等手段研究了Au-Ag-Y三元...

关键词: 材料科学基础学科 , Au-Ag-Y三元系 , 合金 , 相图 , 等温截面

Multiferroic phase diagram of Y partially substituted Dy(1-x)Y(x)MnO(3)

Applied Physics Letters

The effect of nonmagnetic Y partial substitution at the Dy site in Dy(1-x)Y(x)MnO(3) up to x=0.2 on magnetism, specific heat, and ferroelectricity is investigated, which resulted in a preliminary multiferroic phase diagram. It is revealed...

关键词: ferroelectricity;polarization