材料期刊网

Final Temperature Prediction Model of Molten Steel in RH-TOP Refining Process for IF Steel Production

WANG Yu-nan , BAO Yan-ping , CUI Heng , CHEN Bin , JI Chen-xi

钢铁研究学报(英文版)

In order to precisely control the final temperature of molten steel in RH (Ruhrstahl Heraeus)-TOP blowing refining, the final temperature prediction models of molten steel in RH-TOP blowing refining process for Interstitial Free (IF) steel production were established under the condition of oxygen blowing and non-oxygen blowing respectively. The results show that the beginning molten steel temperature of refining and the amount of added scrap were influential factors, the baking temperature in vacuum chamber was a factor that had small influence. When the model was operated, the hitting probability was above 95% (under the condition of both oxygen blowing and non-oxygen blowing) of prediction deviation of ±10 ℃. The accuracy is analyzed.

关键词: RH-TOP , molten steel temperature , prediction model

采用NaN3燃烧合成高α相氮化硅粉体

王飞 , 沈卫平 , 葛昌纯

稀有金属材料与工程

采用燃烧合成方法,以NaN3作为固态氮化剂,制备了α相含量高达97%以上的氮化硅粉体.研究了外部氮气压力对于燃烧合成氮化硅粉体的影响.NaN3的加入主要是为燃烧合成反应提供了比N2分子更高化学活性的内部氮源(N3原子团和N原子),同时作为Si-N反应的催化剂,使Si粉在氮气中的燃烧合成反应更加容易进行.适量的NaN3加入能够促进Si粉的完全氮化并提高燃烧产物中的α-Si3N4含量.详细探讨了采用NaN3作为固态氮化剂条件下可能的氮化硅燃烧合成机理.

关键词: 燃烧合成 , NaN3 , 氮化硅

Two-step magnetization in a spin-chain system on the triangular lattice: Wang-Landau simulation

Physical Review B

The Wang-Landau algorithm is used to study the thermodynamic and magnetic properties of triangular spin-chain system based on two-dimensional Ising model in order to understand the magnetic-order dynamics in Ca(3)Co(2)O(6) compound. The calculated results demonstrate that the equilibrium state of the rigid spins produces the two-step magnetization curve at low temperature even when the random-exchange term is considered. This work indicates that the four-step magnetization behavior observed experimentally must be due to the nonequilibrium magnetization.

关键词: calcium compounds;exchange interactions (electron);Ising model;magnetisation;thermodynamics;one-dimensional ca3co2o6;density-of-states;compound ca3co2o6;phase-diagram;proteins;crystal

天然海水中NaN3对316L不锈钢表面微生物膜催化阴极氧还原的影响

聂鸳鸳 , 段继周 , 杜敏 , 侯保荣

中国腐蚀与防护学报 doi:10.11902/1005.4537.2013.160

利用荧光显微观察技术选择临界使用浓度的NaN3,分别在O2及N2气氛下采用循环伏安及电化学阻抗技术研究其氧还原过程的电化学行为.结果表明,不锈钢表面的生物膜能够加大还原峰电流密度值,当使用临界浓度的NaN3处理不锈钢试样后,还原峰值明显减小,且峰电位均负移.微生物膜能够促进电子传递给最终电子受体O2,同时降低不锈钢材料发生腐蚀的可能性.由此推测,天然海水中,316L不锈钢表面微生物膜改变了传统阴极氧还原的电子传递途径,即加速了O2作为最终电子受体的电子传递过程,催化了O2的还原;同时,还能够抑制不锈钢材料的腐蚀.

关键词: 天然海水 , 316L不锈钢 , NaN3 , 微生物膜 , 细胞色素c氧化酶 , 氧还原

Professor XU Zhong-yu and his research activities

新型炭材料

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Preface to Special Issue on Photocatalysis for celebrating the 20th anniversary of Professor Jimmy C. Yu’s return to Hong Kong and leading photocatalytic research there

催化学报 doi:10.1016/S1872-2067(15)61006-3

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Ion sputter erosion in metallic glass-A response to "Comment on: Homogeneity of Zr(64.13)Cu(15.75)Ni(10.12)Al(10) bulk metallic glass" by L-Y. Chen, Y-W. Zeng, Q-P. Cao, B-J. Park, Y-M. Chen, K. Hono, U. Vainio, Z-L. Zhang, U. Kaiser, X-D. Wang, and J-Z Jiang J. Mater. Res. 24, 3116 (2009)

Journal of Materials Research

The morphology of the dark and bright regions observed by transmission electron microscopy for the Zr(64.13)Cu(15.75)Ni(10.12)Al(10) bulk metallic glass strongly depends on the ion beam parameters used for ion milling. This indicates that the ion beam could introduce surface fluctuation to metallic glasses during ion milling.

关键词: room-temperature

纳米Al2O3对尼龙6结晶性能的影响

张玉庆 , 钟明强 , 蔡伟乐 , 蒋东升

高分子材料科学与工程

采用硅烷偶联剂KH-560对纳米氧化铝( nano-Al2O3)进行表面处理后与尼龙6(PA6)熔融共混制备PA6/nan-Al2O3复合材料,用扫描电镜(SEM)观察了材料断面形貌,借助差示扫描量热仪(DSC)研究了原料配比及降温速率对PA6/nan-Al2O3复合材料结晶性能影响.结果表明,nan-Al2O3在PA6结晶过程中起异相成核作用,限制了PA6分子链运动,使复合材料玻璃化转变温度及结晶度提高,非等温结晶过冷度降低,结晶速率加快;材料结晶温度、结晶焓、结晶度随降温速率增加而下降.

关键词: 尼龙6 , 纳米氧化铝 , 复合材料 , 结晶性能 , 成核作用

Improved Nonlinear Equation Method for Numerical Prediction of Jominy EndQuench Curves

SONG Yuepeng , LIU Guoquan , LIU Shengxin , LIU Jiantao , FENG Chengming

钢铁研究学报(英文版)

Without considering the effects of alloying interaction on the Jominy endquench curves, the prediction results obtained by YU Baihai′s nonlinear equation method for multialloying steels were different from those experimental ones reported in literature. Some alloying elements have marked influence on Jominy endquench curves of steels. An improved mathematical model for simulating the Jominy endquench curves is proposed by introducing a parameter named alloying interactions equivalent (Le). With the improved model, the Jominy endquench curves of steels so obtained agree very well with the experimental ones.

关键词: Jominy endquench curve;nonlinear equation method;alloying interaction parameter;computer simulation

1998 COMPREHENSIVE TABLE OF CONTENTS

中国腐蚀与防护学报

N。1Atmospheric Corrosivlty for Steels………………………………………………… .LIANG Caideng HO[I i。-tat（6）Caustic Stress Corrosion Cr。king of Alloy 800 Part 2.The Effect of Thiosul执e……………………………………… KONG De-sheng YANG Wu ZHAO Guo-zheng HUANG De.ltL。ZHANG Yu。。he CHEN She。g-bac（13）SERS slid E16CttOCh6iniC81 Stlldy Of Illhibit1Oli M6ch＆tllsth Of ThlollY68 Oil ITOll ID H....

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