材料期刊网

HAZ CRACKING AND HOT DUCTILITY OF Ni_3AI CONTAINING Zr ALLOY

B. N. Qian , J. L. Li , J. T. Guo and B. Z. Wei (1)Institute of Metal Research , The Chinese Academy of Sciences , Shenyang 110015 , China 2)Shanghai University , Shanghai 200072 , China)

金属学报(英文版)

The HAZ cracking test in EB welding condition and hot ductility test show that the cracking mechanism is the formation of Ni - Ni5Zr eutectic which is resulting from the enrichment of Zr in grain boundaries during welding.In order to eliminate HAZ cracks the diffusion and recrystalization anealing treatment after cast and during cold rolling should be conducted in vacuum or protecting atmosphere and at the same time a slow welding speed is necessary.

关键词: Ni_3Al bearing Zr alloy , null , null

Fe2+对嗜铁钩端螺旋菌L. ferriphilum生长活性的影响

高健 , 康健 , 吴学玲 , 徐競 , 李邦梅 , 邱冠周

中国有色金属学报

以分离于江西某铜矿的嗜铁钩端螺旋菌(L. ferriphilum YSK)菌株为研究对象,报道不同Fe2+浓度对 L. ferriphilum生长活性的影响.结果表明,YSK菌株生长最适宜的Fe2+浓度约为0.1 mol/L.当初始Fe2+浓度为0.4 mol/L时,进入对数生长期前很明显需要一个较长的延迟期,表明该Fe2+浓度对细胞的生长产生较强的抑制作用;当初始Fe2+浓度为0.6 mol/L时,YSK菌株的生长完全受到抑制.尽管高浓度的Fe2+抑制细胞的生长,但受到抑制而不生长繁殖的YSK细胞仍然具有氧化Fe2+的能力.

关键词: L.ferriphilum YSK菌株 , Fe2+ , 生长活性

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

Effect of Li and Ti Additions on L■α(Al)+Mg_2Si Pseudobinary Eutectic Reaction

Shengxu ZHAO , Shunpu LI , Deqian ZHAO , Mingxiang PAN and Xichen CHEN(Institute of Physics , Chinese Academy of Sciences , Beijing 100080 , China)

材料科学技术（英文）

Effect of Li and Ti additions on Lα(AI)+Mg2Si pseudobinary eutectic reaction in ternary Al-Mg-Si system has been investigated by thermoanalysis, directional solidification and metallographic techniques in this study. It has been found that Li addition causes decreasing of the volume fraction of Mg2Si, while a little amount of Ti causes to increasing, which is of a great importance to the adjustment of phase constitution and alloy properties. Doping components have little influence on the eutectic temperature.

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Distribution, Transportation and Cytolocalization of Neodymium in Oilseed Rape (Brassica napus L.)

魏幼璋

稀土学报(英文版)

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Distribution, Transportation and Cytolocalization of Neodymium in Oilseed Rape (Brassica napus L.)

魏幼璋

稀土学报(英文版)

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Distribution, Transportation and Cytolocalization of Neodymium in Oilseed Rape (Brassica napus L.)

魏幼璋

稀土学报(英文版)

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Distribution, Transportation and Cytolocalization of Neodymium in Oilseed Rape (Brassica napus L.)

魏幼璋

稀土学报(英文版)

关键词:

Distribution, Transportation and Cytolocalization of Neodymium in Oilseed Rape (Brassica napus L.)

魏幼璋

稀土学报(英文版)

关键词:

Distribution, Transportation and Cytolocalization of Neodymium in Oilseed Rape (Brassica napus L.)

魏幼璋

稀土学报(英文版)

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