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The Structure and Mechanical Properties of Cr4Mo4V Steel Treated by PIII Carbonitriding

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稀有金属材料与工程 2012年第S1期41卷 176-179页

作者： Ken Yukimura Harbin Institute of Technology Harbin 150001China

The composition and structure of PIII(plasma immersion ion implantation)carbonitrided Cr4Mo4V steel were analyzed using X-ray photoelectron spectroscopy(XPS),X-ray diffraction(XRD),optical microscopy(OM)and *** results indicate that the nitride and carbide are dispersion phase precipitation and except formation of compound other implantation atoms dissolve into martensite *** total concentration of carbon and nitrogen is about 30 at%near the surface,and still keeps at about 20 at%even at the depth of 8μ*** effect of treatment temperature,implantation time and ratio of N2 to CH4 on the hardness and wear resistance of carbonitrided layer are *** is found that the hardness of Cr4Mo4V steel increases after *** highest hardness of samples is 22.3 GPa,which is about 1.8 times than initial *** dry-wear resistance of the samples is also improved after treatment,and the sample with higher hardness shows the better wear resistance.

关键词： Cr4Mo4V steel pbii carbonitriding hardness wear resistance

A 2-D Pb~Ⅱ Coordination Polymer Constructed by 2,6-Dimethylpyridine-3,5-dicarboxylic Acid

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Chinese Journal of Structural Chemistry 2012年第6期31卷 829-834页

作者：彭大权张明星陈新祝怡杨姗姗 College of Chemistry Chongqing Normal University College of Life Science Chongqing Normal University

Poly[（μ4-2,6-dimethylpyridine-3,5-dicarboxylato）dihydrate]diaqualead（II）] （1） exhi- bits a two-dimensional （2-D） layer structure in which the asymmetric unit contains one Pbn centre, one 2,6-dimethylpyridine-3,5-dicarboxylate （mpdc） ligand and two coordinated water molecules. Each Pbn ion is eight-coordinated and surrounded by eight O atoms from five different mpdc ligands and two terminal water molecules to furnish a distorted square antiprism coordination geometry. The infinite connection of the one-dimensional （1-D） [PbO4（H2O）2]n chains bridged by ligands forms the 2-D [Pb（mpdc）]n layer Structure. In 1, the layers further build up a three- dimensional （3-D） supramolecular architecture via interlaminar hydrogen bonds and π-π stacking.

关键词： pyridinedicarboxylate photoluminescence pbii

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等离子体基离子注入法制备SOI材料

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功能材料 2002年第4期33卷 347-349,353页

作者：于伟东王曦陈静张苗中国科学院上海冶金研究所离子束开放研究实验室上海200050

注氧隔离法 (SIMOX)和体硅智能剥离法 (smart cut)是目前制备绝缘体上的硅 (SOI)材料的最重要的两种方法。而离子注入是其中最主要工艺过程。本文简述了等离子体基离子注入 (pbii)在制备SOI的两种方法中应用的国内外研究现状。讨论了两... 详细信息

注氧隔离法 (SIMOX)和体硅智能剥离法 (smart cut)是目前制备绝缘体上的硅 (SOI)材料的最重要的两种方法。而离子注入是其中最主要工艺过程。本文简述了等离子体基离子注入 (pbii)在制备SOI的两种方法中应用的国内外研究现状。讨论了两种方法中需要考虑的共性问题 ,包括注入剂量的均匀性、等离子体中离子的选择、单一能量的获得以及避免C、N、O及金属粒子的污染等。并且针对SIMOX和smart cut各自的工艺特点 ,分别讨论了不同工艺参数的选择。

关键词：等离子体基离子注入 SOI材料 pbii SIMOX Smart-Cut