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and Fe element powders were reactively ball milled under H2 atmosphere in a planetary ball mill to synthesize Mg2FeH6 hydrogen storage materials. Milling parameters such as the starting powder mole ratio...: fuel cell; magnesium-based hydrogen storage materials; reactively mechanical alloying; ball milling ......
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高温球磨法制备发光材料BaMoO4:Eu3+陈雪冰1,邵忠宝2,田彦文3(1.辽宁省沈阳市东北大学材料与冶金学院2.东北大学 理学院3.东北大学 材料冶金学院,沈阳110004)摘 要:以(NH4)6Mo7O24·4H2O,BaCO3和Eu2O3为原料,用高温球磨法制备稀土掺杂发光材料BaMoO4:Eu3+粉体.利用XRD,SEM和发射光谱对粉体的结构,形貌和性能进行了表征,研究了球磨温度,球磨时间以及Eu3+掺杂量对粉体发光强度的影响.结果表明,用高温球磨法可降低材料的制备温度,并提高Eu3+的猝灭浓度从而提......
) was prepared by a physical and chemical method, the effects of ball milling time on its morphology as well as physical characteristics were investigated. Additionally, the effect of ball milling treatment... and ball milling treatment can greatly accelerate the sintering shrinkage rate of tungsten powder at low temperature, and significantly promote its sintering densification rate, the activated tungsten......
generating hydrogen by splitting water, Al-Ca alloy, was prepared by mechanical ball-milling. In order to improve the hydrogen generation of alloy, NaCl was added as the activation modifier during the process of ball-milling. The research results show that the addition of NaCl can resist the agglomeration of alloy powder and improve hydrogen yield. The hydrogen generation rate and hydrogen yield......
Trans. Nonferrous Met. Soc. China 22(2012) s793-s800 Rotary ultrasonic-assisted milling of brittle materials KUO Kei-lin1, TSAO Chung-chen2 1. Department of Vehicle Engineering, National Taipei... to improve the machining efficiency of ultrasonic milling, the easiest and most effective approach was started with the improvement of tool design. The main objective of this research was to utilize rotary......
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剪切变形方式下低碳钢表面纳米结构的形成刘刚1,莫成刚1,武保林2,左良1(1.辽宁省沈阳市东北大学研究院2.沈阳航空航天大学 材料工程系,辽宁沈阳 110136)摘 要:对低碳钢板材进行表面球磨处理,利用电子显微术研究剪切变形方式下深度方向的组织演变.结果表明,低碳钢的纳米化过程包括:位错通过增殖,运动,湮灭和重组形成位错墙;位错墙逐渐转变成小角度和大角度晶界,将原始粗晶分割成亚微晶;亚微晶内重复上述过程使晶粒继续细化,最终形成等轴状,取向接近随机分布的纳米晶组织.外力作用方向并未改变纳米化过程,但会影响变形层......
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