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

+高級檢索
加壓退火對 (La0.6Ce0.4)65Al10Cu25塊體非晶合金晶化行為和熱穩(wěn)定性的影響
DOI:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項目:

國家自然科學(xué)基金重點項目 (50631010)；國家自然科學(xué)基金面上項目 (50771006)，航空科學(xué)基金 (2009ZF51062)，高等學(xué)校博士學(xué)科點專項科研基金 (20091102120009)


Effects of Preannealing under Pressure on the Crystallization Behavior and Thermal Stability of (La0.6Ce0.4)65Al10Cu25 Bulk Metallic Glasses
Author:
Affiliation:

Fund Project:

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

    利用銅模鑄造法制備了(La0.6Ce0.4)65Al10Cu25塊體非晶合金，并在其過冷液相區(qū)內(nèi)不同溫度下，采用不同壓力對該非晶合金進行加壓退火處理，通過X射線衍射儀和差示掃描量熱法研究了加壓退火處理對該非晶合金晶化行為及熱穩(wěn)定性的影響。結(jié)果表明，加壓退火促進了(La0.6Ce0.4)65Al10Cu25非晶合金的晶化過程，使得晶化初始溫度Tx降低 （dTx/dP= –5.17 K/GPa），晶化激活能Ep隨退火壓力的增加而增大，并從能量和化學(xué)短程序疇的角度解釋了加壓退火對(La0.6Ce0.4)65Al10Cu25非晶合金晶化過程的影響機理。

    Abstract:

    (La0.6Ce0.4)65Al10Cu25 bulk metallic glasses (BMGs) were prepared by copper-mold casting. The crystallization behavior and thermal stability of (La0.6Ce0.4)65Al10Cu25 were investigated by X-ray diffraction and differential scanning caloricity (DSC) after being annealed at its supercooled liquid region under the pressure ranging from ambient pressure to 1015 MPa. Results show that pressure promotes crystallization of (La0.6Ce0.4)65Al10Cu25 BMGs. The onset crystallization temperature Tx decreases with increasing of preannealing pressure at a slope of –5.17 K/GPa, and the apparent activation energy of the crystallization Ep determined by Kissinger equation increases with increasing of preannealing pressure. The influencing mechanism of preannealing under pressure on the crystallization of (La0.6Ce0.4)65Al10Cu25 BMGs were discussed in the view of Gibbs free energy and chemical short range order.

    參考文獻
    相似文獻
    引證文獻
引用本文

劉 彤,朱亞蓉,張 濤.加壓退火對 (La0.6Ce0.4)65Al10Cu25塊體非晶合金晶化行為和熱穩(wěn)定性的影響[J].稀有金屬材料與工程,2012,41(3):452~456.[Liu Tong, Zhu Yarong, Zhang Tao. Effects of Preannealing under Pressure on the Crystallization Behavior and Thermal Stability of (La0.6Ce0.4)65Al10Cu25 Bulk Metallic Glasses[J]. Rare Metal Materials and Engineering,2012,41(3):452~456.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:2011-03-27
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: