材料期刊网

Sorption Separation of Pairs of Elements with Similar Properties Pd(Ⅱ)-Pt(Ⅳ) and Pd(Ⅱ)-Cu(Ⅱ)Using Chemically Modified Silica Containing Sulfide Sulfur

BORYAGINA I.V. , VOLCHKOVA E.V. , BUSLAEVA T.M. , LOBANOVA U.A. , EHRLICH G.V.

贵金属

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Synthesis of Catalytic Systems Based on Nanocomposites Containing Palladium and Hydroxycarbonates of Rare-Earth Elements

GALANTSEVA M.V. , BUSLAEVA T.M. , PAKKANEN T. , FOMICHEV V.V. , MISCHIHINA E.A.

贵金属

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Tetragonal Domain Switching via Reversible t■m Phase Transformation

Haiyan ZHU and Zhicheng XU(Dept. of Materials Science and Engineering , Zhejiang University , Hangzhou 310027 , China)

材料科学技术（英文）

Grinding-induced tm phase transformation and the resultant texture in ceria-yttria-doped tetragonal zirconia polycrystals with varied tetragonality have been studied by XRD. It is observed that the reversible tm phase transformation occurs during grinding and the intensity ratio of I(002)t/I(200)t increases with the transformability. The author proposes that the texture induced by grinding at low temperatures is due to the tetragonal variant reorientation via cyclic,reversible tm phase transformation, termed "transformational domain switching", instead of the ferroelastic one

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M40J和T300碳纤维的微结构

孙银洁 , 胡胜泊 , 李秀涛

宇航材料工艺 doi:10.3969/j.issn.1007-2330.2010.02.027

利用SEM、TEM、XPS、XRD、Raman和元素分析仪分析了M40J和T300的表面化学、物理及微观结构特征.研究发现:M40J含碳量高于T300纤维,而含氮量低于T300纤维,且表面活性基团比T300纤维低;M40J和T300碳纤维表面具有大量沟槽,前者相对长而浅,后者相对短而深;T300纤维端面皮芯结构明显,而M40J端面结构较均匀;M40J的微晶结构及取向性优于T300碳纤维.

关键词: M40J碳纤维 , 微观结构 , 化学特征 , 物理特征

M40-T300/BADCy混杂复合材料的研究

任鹏刚 , 梁国正

航空材料学报 doi:10.3969/j.issn.1005-5053.2007.01.012

利用单向铺层模压工艺制备了M40-T300/BADCy单向层内和层间混杂复合材料,研究了混杂方式、混杂比及铺层顺序对混杂复合材料的拉伸性能、弯曲性能及层间剪切性能的影响规律.结果发现,层内混杂复合材料的性能介于两种单一复合材料之间,T300纤维含量越高,强度越大,M40纤维含量越高,则模量越大.以T300纤维为芯层,M40纤维为外层的层间混杂复合材料([(M40)1/(T300)3]s)具有与M40/BADCy复合材料相近的弯曲模量及与T300/BADCy复合材料相近的层间剪切强度,适合作为航天飞行器结构材料使用.

关键词: T300纤维 , M40纤维 , 氰酸酯树脂 , 混杂复合材料

Corrosion protection of aluminium alloy 2024-T3 in 0.05 M NaCl by cerium cinnamate

Corrosion Science

The corrosion protection of AA 2024-T3 in 0.05 M NaCl by cerium cinnamate has been studied. Polarization measurements demonstrate that cerium cinnamate is markedly effective for suppressing anodic process of the alloy corrosion during the initial 72 h of immersion. The protection mechanism during the immersion period appears to involve two stages: the deposition of cerium cinnamate, and then hydrolysis of cerium ions forming a cerium oxide/hydroxide, prevailing over the foregoing deposition. This study also elucidates the inhibition effect of cerium cinnamate on the early corrosion attack occurred from the second phase particles by X-ray photoelectron spectroscopy and electron-probe microanalysis. (C) 2011 Elsevier Ltd. All rights reserved.

关键词: Alloy;Rare earth elements;EIS;XPS;Neutral inhibition;chromate conversion coatings;hydroxy carboxylic-acids;pitting;corrosion;galvanized steel;amino-acids;inhibition;xps;al;polymer;salts

T15M粉末高速钢的深冷处理

孙世清

材料热处理学报

采用SLX-80深冷处理系统对T15M粉末高速钢进行深冷处理,采用综合物理测试系统的振动样品磁强计选件(PPMSVSM)测试样品的室温磁性和热磁性.结果表明:T15M钢在843 K×1 h的回火过程中,在保温和降温阶段出现残留奥氏体向马氏体的转变.在300 ～ 10 K之间深冷处理过程中,降温时在110～10 K温度段磁性随温度下降而下降,升温时在40 ～ 230 K温度段磁性随温度上升而上升,分别对应于马氏体中碳化物的析出和残留奥氏体向马氏体的转变.深冷处理提前了残留奥氏体向马氏体的转变,抑制了残留奥氏体中碳化物的析出,促进了马氏体中细小碳化物的析出.在第1次回火前或后增加1次深冷处理,可使第3次回火后钢的硬度分别提高2.0 HRC和1.4 HRC.

关键词: 粉末高速钢 , 深冷处理 , 热磁性 , 硬度 , 碳化物

Phase relations of R-T-M ternary system, crystal structure and magnetic properties of R(T,M)(13) compounds (R equals light rare earth; T=Co, Fe; M=Al, Si) .2. Crystal structure and magnetic properties of R(T,M)(13) compounds

自然科学进展﹒国际材料（英文）

关键词: crystal structure;magnetic properties;R(T, M)(13) compounds;X-ray;powder diffraction;intermetallic compounds;alloys

Phase relations of R-T-M ternary system, crystal structure and magnetic properties of R(T, M)(13) compounds (R equals light rare earth; T=Co, Fe; M=Al, Si) .1. Phase relations of R-T-M ternary system

自然科学进展﹒国际材料（英文）

关键词: phase relations of R-T-M ternary system;X-ray powder diffraction;ultrathin multilayer films;self-assembly process;molecular deposition;charged surfaces;buildup;adsorption;heterostructures;phthalocyanine;nanoparticles

C M T片材烘干炉的温度自动控制系统

刘永纯

玻璃钢/复合材料 doi:10.3969/j.issn.1003-0999.2001.04.012

本文针对GMT片材生产过程的具体情况,采用上下位微机协调解耦控制,使烘干炉满足GMT片材烘干的技术要求

关键词: GMT片材烘干炉协调解耦控制