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
粒度配比法制備近全致密W/Cu20復(fù)合材料
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:


Fabrication of W/Cu20 Composite Materials with Nearly Full Density by Particle Size Distribution Method
Author:
Affiliation:

Fund Project:

National Outstanding Young Scientist Foundation of China (50125415)

  • 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:

    選用A、B兩種不同粒度的W粉，調(diào)節(jié)A、B鎢粉的比例，并與Cu粉直接混合，配制成W/Cu20（質(zhì)量分?jǐn)?shù)%，下同）混合粉末，經(jīng)熱壓制備了近全致密的W-Cu復(fù)合材料。顯微組織觀察表明，隨著小粒度W粉配比的增加，大W顆粒形成的孔隙逐漸減少，而小W顆粒形成的孔隙逐漸增加。當(dāng)W粒度配比為80%A+20%B時(shí)，形成較為致密的堆積結(jié)構(gòu)。在合適的工藝條件下（燒結(jié)溫度1060 ℃、壓力85 MPa、保溫3 h），所制備的W/Cu20復(fù)合材料其相對(duì)密度達(dá)到98.6%，Cu相沿大W顆粒和小W顆粒的邊界呈現(xiàn)網(wǎng)狀分布。

    Abstract:

    In order to fabricate highly dense W/Cu20 (mass fraction, similarly hereinafter) composite materials, two kinds of tungsten powder with different particle size, A and B, were used. The W powder with different ratios of A and B were directly mixed with copper powder and W/Cu20 mixed powder was obtained. Almost fully dense W-Cu composite materials were fabricated by solid-state hot pressing. The observation of microstructure shows that with increasing of the fine W powder (B) content, the pores formed by the coarse W powder (A) decrease and the pores by the fine W powder increase gradually. Rather dense microstructure is obtained when the W particle distribution is 80%A+20%B. The W/Cu20 with 98.6% relative density is obtained under the processing conditions of sintering temperature of 1060 °C, pressure of 85 MPa and holding time of 3 h. Copper forms into a network structure around the coarse W particles and the fine W particles.

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

劉彬彬,陳江華,謝建新.粒度配比法制備近全致密W/Cu20復(fù)合材料[J].稀有金屬材料與工程,2010,39(1):17~21.[Liu Binbin, Chen Jianghua, Xie Jianxin. Fabrication of W/Cu20 Composite Materials with Nearly Full Density by Particle Size Distribution Method[J]. Rare Metal Materials and Engineering,2010,39(1):17~21.]
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:2009-01-13
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: