材料期刊网

Machinable REPM with Excellent Intrinsic Coercive Force Prepared by DS Technology

Xincai LIU , Jin PAN , Zhifeng XU , Jianping ZHUANG , Min LIU and Dongming YU (Nanchang Institute of Aeronautical Technology , Nanchang 330034 , China)Zhengxing SH and Hengzhi FU(Northwestern Polytechnic University , Xi'an 710072 , China)

材料科学技术（英文）

To obtain excellent magnetic properties of machinable REPM prepared by directional solidification (DS) technology Space A, a composition area with θ=0°~5° where easy axis is parallel to solidified direction of alloys, has been established in Zr-Sm-La-Co-Cu-Fe system. In 2/17+1/5+Co, and 2/17+1/5 region near Co phase of Space A, one obtains:Vf = 80.933 - 2.739Zr - 1.828Sm - 0.773Co - 0.147Cu + 0.415Fe + 0.218LaNonequilibrium solidification process of alloys in 2/17+1/5+Co region, is as follows: L→Co,L→2/17, L+2/17→1/5 and L→1/(5-x)+1/(5+x). The product of partially completed peritectic reaction, and 1/(5-x) and 1/(5+x) phases can all be transformed into a homogeneous 1/5 phase after solution treatment in 1413 K for 5 h. Containing 3~6% Co phase magnetically hardened by 0.5~2.5% V, the DS magnets have been achieved with both improved toughness and excellent coercive force of 520 kA/m.

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FU105大功率广播发射管用碳化镧钼阴极研究

万小峰 , 张久兴 , 周文元 , 李湘波 , 周美玲

稀有金属材料与工程

研究了FU105大功率广播发射管用碳化镧钼阴极,参照碳化钍钨阴极FU105管的制备工艺,实现了镧钼阴极的碳化以及镧钼阴极FU105管的排气和老炼.通过镧钼阴极FU105管的性能测试,对碳化镧钼阴极的发射能力和稳定性进行了分析.结果认为:FU105管碳化镧钼阴极的发射能力可以达到碳化钍钨阴极的水平,但其稳定性还有待改进.

关键词: 镧钼阴极 , FU105发射管 , 碳化 , 稀土

[Pt(en)(5-Fu)2]Cl2配合物的合成及抗肿瘤活性

钟文远 , 崔永春 , 范春兰 , 胡智兴 , 李玛琳

贵金属 doi:10.3969/j.issn.1004-0676.2004.02.005

为寻求高效低毒的新型顺铂类抗肿瘤药物,用K2PtCl4、乙二胺(en)、氟尿嘧啶(5-Fu)为原料,设计合成了顺铂类似物[pt(en)(5-Fu)2]C12配合物,由元素分析、红外光谱和质谱分析初步证实了其化学结构,用改良MTT、SRB法,选用K562、A549、Bel-7402、BIU-87、Bcap-37细胞株对其进行体外抗肿瘤活性测定.结果表明,所合成的配合物除在浓度为0.01、0.1 μg/mL时对K562细胞株抗肿瘤活性大于顺铂和氟尿嘧啶外,其它情况下的抗肿瘤活性均小于顺铂和氟尿嘧啶.该配合物仍有进一步研究的价值.

关键词: 药学 , 铂(Ⅱ)配合物 , 合成 , 抗肿瘤活性

STATISTICAL EVALUATION OF CRITICAL INCLUSION FACTOR FOR SECONDARY RECRYSTALLIZATON IN 3%Si STEEL Lecturer,Department of Materials Engineering,Southwestern Jiaotong University,Chengdu 610031,China

LI Shuchen Southwestern Jiaotong University , Chengdu , ChinaCHEN Mengzhe KE Jun University of Science and Technology Beijing , Beijing , China

金属学报(英文版)

On the basis of statistical data of MnS in the conventional 3% Si steel sheeets after various annealing processes,the critical inclusion factor has been evaluated to be 20 mm~(-1).The inhi- bition of MnS to grain growth has been exactly described.

关键词: 3%Si steel , null , null

CORRELATION BETWEEN STRESS COMPONENTS AND STRESS CORROSION CRACKS IN BRASS Lecturer,Department of Materials Physics,University of Science and Technology Beijing,Beijing 100083,China

QIAO Lijie LIU Rui XIAO Jimei University of Science and Technology Beijing , Beijing , China

金属学报(英文版)

The effects of stress components on nucleation sites and propagation directions of stress cor- rosion cracks in brass were investigated with specimens under mode Ⅱ and mode Ⅲ loadings. The results indicated that under mode Ⅱ loading,stress corrosion cracks nucleated on the site with maximum normal stress component and propagated along the plane perpendieular to the maximum normal stress,under mode Ⅲ loading,the stress corrosion crack was not evident on the 45°plane due to the general corrosion in aqueous solution with high NH_4OH concentra- tion,while stress corroded in aqueous solution with low NH_4OH concentration, numerous cracks with spacings of 10—150μm were found on the 45°plane with maximum normal stress and no stress corrosion cracks was observed on the plane with maximum shear stress.

关键词: stress corrosion cracking , null , null , null

Introduction to atmospheric corrosion research in China

Science and Technology of Advanced Materials

In this paper, we introduce the research on atmospheric corrosion in China. We describe the climate characteristics and the classification of atmospheric corrosivity across the whole country. We also describe the rusting evolution under simulated wet/dry cyclic conditions. (C) 2007 NIMS and Elsevier Ltd. All rights reserved.

关键词: atmospheric corrosion;corrosivity;rusting evolution;weathering steels;rust;mechanism;so2;o-3;no2

Recent Advances of Laser Coating Technology in China

LIANG Yong LI Ruiguo Institute of Metal Research , Academia Sinica , Shenyang 110015 , ChinaInstitute of Corrosion and Protection of Metals , Aademia Sinica , Shenyang , 110015 , China

材料科学技术（英文）

Recent advances in laser coating technology including laser cladding,laser surface alloying and laser vapour deposition in China are reviewed in this paper.

关键词: laser , null , null , null , null

压电复合材料层合结构中的SH波

代海涛 , 程伟

复合材料学报 doi:10.3321/j.issn:1000-3851.2007.01.030

考虑压电耦合效应,通过传递矩阵-二维谱分析研究了压电复合材料层合板稳态SH波的频散特性和瞬态SH波的传播特性.数值分析表明: 压电耦合作用提高了SH波的截止频率和相速度;由表面扰动激发的SH波,一部分能量向板深度方向传播,一部分以表面波的形式在两倍波长深度内传播.所采用的传递矩阵-二维谱分析为层合结构瞬态波动研究提供了一种有效的数值方法.

关键词: SH波 , 压电效应 , 频散关系 , 传递矩阵 , 二维谱 , 表面波

共混膜SH/KGM作为防止瘢痕粘连材料的体外实验研究

朱向情 , 陈强 , 庞荣清 , 陈翠竹 , 王强 , 陈佳 , 陈庆华 , 潘兴华

材料导报 doi:10.11896/j.issn.1005-023X.2014.22.012

利用透明质酸钠(Sodium hyaluronate,简称SH)和魔芋葡甘聚糖(Konjac glucomannan,简称KGM)制备共混膜SH/KGM,通过膜的干预减少或阻止硬膜外瘢痕的形成.选择人皮肤成纤维细胞为种子细胞,采用流式细胞术和半定量PCR方法检测细胞的纯度;通过体外移植的方法将成纤维细胞移植到SH/KGM共混膜表面,细胞形态学观察发现细胞由原来的梭形变成不规则的圆形,且细胞能够粘附于SH/KGM共混膜的表面,但移植细胞在移植后的2天、5天和7天内均没有观察到增殖.这种现象表明共混膜SH/KGM具有防止硬膜外瘢痕粘连的作用,可以作为腰椎手术的介入材料.

关键词: 皮肤成纤维细胞 , 透明质酸钠 , 魔芋葡甘聚糖 , 共混膜 , 瘢痕

基于SH1123驱动器的OLED接口及驱动程序设计

丁卫撑 , 王义 , 李元景 , 王敏 , 方方

液晶与显示 doi:10.3969/j.issn.1007-2780.2009.06.024

介绍了基于SH1123驱动器的OLED点阵图形显示模块,给出了模块与微处理器C8051F340的硬件接口电路,简要分析了SH1123的指令系统,对C语言编程环境下模块底层驱动程序的实现进行了重点阐述,并给出如何利用按键实现显示菜单控制的方法.

关键词: 微处理器 , 接口 , 驱动程序 , OLED显示