最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級(jí)檢索
射頻等離子體制備球形鈦粉
DOI:
作者:
作者單位:

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

國家自然科學(xué)基金（51274039）；新金屬材料國家重點(diǎn)實(shí)驗(yàn)室開放基金資助項(xiàng)目（2010Z-09）；北京市先進(jìn)粉末冶金材料與技術(shù)重點(diǎn)實(shí)驗(yàn)室開放基金


Preparation of Micro-spherical Titanium Powder by RF Plasma
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計(jì)
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評(píng)論
    摘要:

    以不規(guī)則形狀的大顆粒TiH2粉末為原料，采用射頻等離子球化處理技術(shù)制備出微細(xì)球形Ti粉。采用掃描電子顯微鏡、X射線衍射和激光粒度分析測(cè)試方法對(duì)粉末形貌、物相和粒度進(jìn)行測(cè)試。結(jié)果表明：大顆粒的TiH2粉末的脫氫分解、爆碎和球化處理在等離子體中一步完成，得到微細(xì)球形粉末。其相組成主要為Ti和殘余TiH相；球形粉末在1.3×10-4 Pa真空條件下，經(jīng)750 ℃、2 h脫氫處理后得到單相球形Ti粉。顆粒平均粒徑由原來的100~150 μm減小至20~50 μm，球化率可達(dá)到100%。隨著加料速率的增加，粉末的球化率降低。采用射頻等離子體處理TiH2粉是制備微細(xì)球形鈦粉的一種新方法。

    Abstract:

    Spherical micro-sized titanium powder was synthesized by (RF) plasma with large TiH2 powder as starting material. The phase, morphology and particle size distribution of the powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and laser micron sizer (LMS), respectively. The dehydrogenation, hydrogen decrepitation and spheroidization of TiH2 feedstock take place in one-step by RF plasma processing and the prepared spherical powder possesses favorable dispersity and smooth surface. The prepared fine spherical powder is composed of Ti and residual TiH. Pure single-phase spherical titanium powder is obtained after further vacuum (1.3×10-4 Pa) dehydrogenation treatment at 750 oC for 2 h. The average size of Ti powder is reduced from 100~150 μm of TiH2 powders to 20~50 μm after the treatment in the plasma. The spheroidization efficiency is almost 100% at feeding rate of 15 g/min. The RF plasma-assisted argon dehydrogenation and decomposition of TiH2 is an ideal route for large-scale synthesis of well- spherical metallic titanium powder.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

盛艷偉,郭志猛,郝俊杰,邵慧萍,王述超.射頻等離子體制備球形鈦粉[J].稀有金屬材料與工程,2013,42(6):1291~1294.[Sheng Yanwei, Guo Zhimeng, Hao Junjie, Shao Huiping, Wang Shuchao. Preparation of Micro-spherical Titanium Powder by RF Plasma[J]. Rare Metal Materials and Engineering,2013,42(6):1291~1294.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點(diǎn)擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2012-06-15
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: