任海果,王文佳,高建军,阎光明,赵志龙.NiAl-W共晶定向凝固组织控制与W介纳米丝形貌[J].稀有金属材料与工程,2016,45(1):222~226.[Ren Haiguo,Wang Wenjia,Gao Jianjun,Yan Guangming,Zhao Zhilong.The Microstructure Control of NiAl-W Eutectic Directional Solidification and the Morphology of W Meso-nanowires[J].Rare Metal Materials and Engineering,2016,45(1):222~226.]
NiAl-W共晶定向凝固组织控制与W介纳米丝形貌
投稿时间:2015-04-14  修订日期:2015-09-14
中文关键词:  介纳米金属丝  定向凝固  共晶合金  选择性溶解
基金项目:国家自然科学基金资助(项目号51374173)
中文摘要:
      在300 K/cm 的温度梯度条件下,实施不同抽拉速率下的NiAl-1.5at%W共晶合金定向凝固,分析研究抽拉速率对W纤维相相间距、纤维相尺寸的影响规律,并使用盐酸双氧水溶液对NiAl基体进行选择性溶解,制备出当量直径小于500nm的钨纤维丝束。研究结果表明:随着抽拉速率的增大,W纤维相截面形状圆度增加, W纤维相相间距和W纤维相截面当量直径均减小,两者的比值在6.12到7.54之间,经选择性溶解获得W纤维具有多样的三维形貌,呈现出薄带状、珍珠串状和搭接状,发现其形貌与抽拉速率有关。
The Microstructure Control of NiAl-W Eutectic Directional Solidification and the Morphology of W Meso-nanowires
英文关键词:metallic meso-nanowires  directional solidification  eutectic alloy  selective dissolution
英文摘要:
      Under a temperature gradient of 300 K/cm, NiAl-1.5at%W eutectic samples were directionally solidified at the different drawing rates to analyze the effect of the drawing rates on the spacing and the size of W fiber phases. Moreover. the NiAl matrix was selectively etched by using a solution of HCl:H2O2 to prepare the tunsten fiber filaments with the equivalent diameter less than 500 nm. The research results show that the roundness of W fiber phase cross-section increases, the spacing and the equivalent diameter of W fiber phase both decreases, the ratio between them is in the range of 6.12 to 7.54, as increasing the drawing rate; and that the tungsten fibers obtained by selective dissolution have the diversiform three-dimensional morphologies, such as the thin strip, pearl string and lapping state, which have been found that those shapes have a relationship with the drawing rate.
作者单位E-mail
任海果 西北工业大学 机电学院 rhglql@nwpu.edu.cn 
王文佳 西北工业大学 机电学院  
高建军 西北工业大学 机电学院  
阎光明 西北工业大学 机电学院  
赵志龙 西北工业大学 机电学院  
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