5Gd相增多加劇了鎂合金腐蝕。"/>

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
稀土Gd對SLM成型Mg-Zn-Gd合金耐蝕性能研究
作者:
作者單位:

1.河北科技大學(xué)機(jī)械工程學(xué)院;2.河北科技大學(xué);3.唐山威豪鎂粉有限公司

作者簡介:

通訊作者:

中圖分類號:

TG146.2+2

基金項目:

國防基礎(chǔ)科研計劃(JCKY2018407C004)；中央引導(dǎo)地方科技發(fā)展資金(206Z1806G)；河北省高校百名優(yōu)秀創(chuàng)新人才支持計劃(SLRC2019050)；河北省研究生創(chuàng)新資助項目(XJCXZZSS202117)


Effect of Gd element on corrosion rate of SLM forming medical magnesium alloy
Author:
Affiliation:

1.Hebei University of Science Technology;2.Tangshan Weihao Magnesium Powder Co,LTD

Fund Project:

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

    鎂合金具有高比強(qiáng)度與良好的生物相容性,是一種理想的骨植入材料。因鎂合金降解速率過快在臨床應(yīng)用中受到限制,通過SLM可對其合金化并改善耐蝕性能。利用SLM成型Mg-1Zn-xGd(x=0、0.25、0.5、1、2 wt%)合金,測試鎂合金在模擬體液中浸泡72 h平均腐蝕速率變化趨勢,采用SEM、EDS與TEM檢測手段輔助分析腐蝕機(jī)理。實驗結(jié)果表明,Gd含量對鎂合金腐蝕速率影響顯著,添加0~2 wt% Gd后鎂合金降解速率呈先降低后升高趨勢,在添加0.5 wt% Gd時鎂合金具有最佳耐腐蝕性能。腐蝕反應(yīng)產(chǎn)生的表面鈍化膜能夠一定程度減緩腐蝕的進(jìn)行,添加過量Gd后沿晶界析出Mg5Gd相增多加劇了鎂合金腐蝕。

    Abstract:

    Magnesium alloy is an ideal bone implant material with high specific strength and good biocompatibility.SDue to the limitation of rapid degradation rate of magnesium alloy in clinical application, SLM can be used to alloyed magnesium alloy and improve its corrosion resistance.SMg-1zn-xGd (x=0, 0.25, 0.5, 1, 2 wt%) alloy was formed by SLM, and the average corrosion rate of magnesium alloy soaked in simulated body fluid for 72 h was tested. The corrosion mechanism was analyzed by SEM, EDS and TEM.SThe experimental results show that Gd content has a significant effect on the corrosion rate of magnesium alloy, and the degradation rate of magnesium alloy decreases first and then increases with the addition of 0~2 wt% Gd, and the magnesium alloy has the best corrosion resistance with the addition of 0.5 wt% Gd.SThe surface passivation film produced by the corrosion reaction can slow down the corrosion process to a certain extent, and the Mg5Gd phase precipitated along the grain boundary increases after the addition of excessive Gd, resulting in intensified corrosion of magnesium alloy.

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

楊光,王琮瑋,王琮瑜,王金業(yè),劉大志.稀土Gd對SLM成型Mg-Zn-Gd合金耐蝕性能研究[J].稀有金屬材料與工程,2022,51(6):2167~2174.[Yang Guang, Wang Congwei, Wang Congyu, Wang Jinye, Liu Dazhi. Effect of Gd element on corrosion rate of SLM forming medical magnesium alloy[J]. Rare Metal Materials and Engineering,2022,51(6):2167~2174.]
DOI：10.12442/j. issn.1002-185X.20210916

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:2021-10-20
  • 最后修改日期:2021-12-13
  • 錄用日期:2022-01-29
  • 在線發(fā)布日期: 2022-07-06
  • 出版日期: 2022-06-29