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論文
【年度】103
年研發成果
【項目】
論文
【領域】
關鍵技術科專
【類別】
機電運輸
| 計畫名稱 | 高階稀有綠能材料應用研究發展計畫 | | 論文名稱 | Fabrication of tungsten based heavy alloys prepared by liquid phase sintering technique | | 論文類型 | 期刊 | | 發表處 | International Symposium on Materials for Enabling Nanodevices(ISMEN-2014) | | 發表人 | -Shu-Yi Tsai , Chung-Ta Ni ,Kuan-Zong Fung , Chao-Nan Wei , and Hui-Yun Bor | | 發表日期 | 2014/09/03 | | 國家 | 國外 | | 內容摘要 | High performance tungsten heavy alloys have been developed and found wide industrial applications in chemical processing, national defense and aerospace industries for their high density, excellent strength, good ductility and toughness. Since the melting temperature of tungsten element is too high to be fabricated by the melting process, the tungsten alloy only can be synthesized by powder metallurgy process. In order to fabricate the tungsten heavy alloy target at a lower temperature, the additive with different Ni/Fe ratio was used because it can reduce the melting point of the tungsten matrix and lower sintering temperatures. The result revealed that the crystallite size of the tungsten heavy alloys reaches around 300 nm after mechanical milling for 24 hours. An increase in the mass ratio of nickel to iron resulted in the increase of dissolved concentration of tungsten in the matrix, almost in a linear manner. |
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