2復合材料;摻雜比例;微觀組織;元素分布"/> 2摻入量的TC4/ZrO2薄壁,研究了掃描速率對金屬基陶瓷材料成形熱應力的影響,利用X射線衍射儀(XRD)和掃描電鏡(SEM)、X射線能量色散譜儀(EDS)對薄壁樣件的進行相組成分析、微觀組織觀察以及元素分布檢測。研究表明,相對較低的掃描速度可以減小薄壁件的殘余應力,抑制樣件的宏觀裂紋；XRD結(jié)果顯示當ZrO2含量達到30%以上時,生成了TiO.325的Ti的非化學計量氧化物；TC4基體的微觀組織隨著ZrO2摻入量的增多晶粒逐漸從針狀過渡到板條狀、塊狀；EDS結(jié)果顯示當Ti晶粒為板條狀,晶界間有ZrO2富集；隨著ZrO2含量增多,Ti固溶體中固溶的Zr增多。本研究為最終成形TC4/ZrO2梯度材料提供了可靠的技術(shù)支持。"/>

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TC4/ZrO2復合材料激光近凈成形微觀組織分析
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大連理工大學精密與特種加工教育部重點實驗室,大連理工大學精密與特種加工教育部重點實驗室,大連理工大學精密與特種加工教育部重點實驗室,大連理工大學精密與特種加工教育部重點實驗室,大連理工大學精密與特種加工教育部重點實驗室

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國家自然科學基金資助(項目號51402037)；國家重點基礎研究發(fā)展計劃(NO.2015CB057305)


Microstructure analysis of TC4/ZrO2 composites forming by laser engineered net shaping
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Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education,Dalian University of Technology,Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education,Dalian University of Technology,Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education,Dalian University of Technology,Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education,Dalian University of Technology,Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education,Dalian University of Technology

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    摘要:

    采用激光近凈成形系統(tǒng)成形了不同ZrO2摻入量的TC4/ZrO2薄壁,研究了掃描速率對金屬基陶瓷材料成形熱應力的影響,利用X射線衍射儀(XRD)和掃描電鏡(SEM)、X射線能量色散譜儀(EDS)對薄壁樣件的進行相組成分析、微觀組織觀察以及元素分布檢測。研究表明,相對較低的掃描速度可以減小薄壁件的殘余應力,抑制樣件的宏觀裂紋；XRD結(jié)果顯示當ZrO2含量達到30%以上時,生成了TiO.325的Ti的非化學計量氧化物；TC4基體的微觀組織隨著ZrO2摻入量的增多晶粒逐漸從針狀過渡到板條狀、塊狀；EDS結(jié)果顯示當Ti晶粒為板條狀,晶界間有ZrO2富集；隨著ZrO2含量增多,Ti固溶體中固溶的Zr增多。本研究為最終成形TC4/ZrO2梯度材料提供了可靠的技術(shù)支持。

    Abstract:

    Different added proportion of ZrO2 in TC4/ZrO2 composite thin-wall samples were produced by laser engineered net shaping. Influence of scanning speed on thermal stress in forming process was studied. X-ray diffractometer analysis(XRD), scanning electron microscopy(SEM) and energy dispersive spectroscopy(EDS) were carried out for the sample phase composition, microstructure and elements distribution respectively. The research indicates that lower scanning speed can reduce the residual stress of thin-wall samples and the tendency to cracking. The result of XRD shows that when the proportion of ZrO2 is higher than 30%, nonstoichiometric compound ,TiO.325, is formed; The grain morphology of TC4 matrix changed from acicular, lamellar to bulk grain with the increasing of proportion of ZrO2; The result of EDS shows a segregation of ZrO2 at lamellar Ti grain boundaries; The content of Zr in Ti solid solution increases with the content of ZrO2increasing.A reliable technical support is provided by this study to finally form TC4/ZrO2 graded materials.

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沈忱,馬廣義,閆帥,牛方勇,吳東江. TC4/ZrO2復合材料激光近凈成形微觀組織分析[J].稀有金屬材料與工程,2018,47(8):2465~2471.[Shen Chen, Ma Guangyi, Yan Shuai, Niu Fangyong, Wu Dongjiang. Microstructure analysis of TC4/ZrO2 composites forming by laser engineered net shaping[J]. Rare Metal Materials and Engineering,2018,47(8):2465~2471.]
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  • 收稿日期:2016-08-30
  • 最后修改日期:2016-09-22
  • 錄用日期:2016-10-18
  • 在線發(fā)布日期: 2018-10-17
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