4C/Ti顆粒增強銅基復合材料(CTBCs),通過X射線衍射(XRD)、光學顯微鏡(OM)、掃描電子顯微鏡(SEM)以及能譜(EDS)等測試手段對其微觀組織形貌進行表征。結果表明,(B4C+Ti)顆粒在基體中均勻分布,增強體與銅基體界面結合良好,且其結合形式為冶金結合和機械結合并存。采用阿基米德排水法測定出燒結態(tài)試樣的致密度。復合材料的顯微硬度、拉伸屈服強度、抗拉強度和延伸率等力學性能相較于純銅試樣得到顯著提高,這主要歸因于載荷傳遞、細化晶粒與熱錯配等強化機制。復合材料的拉伸斷口表現(xiàn)出明顯的韌性斷裂特征。"/>

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含微納B4C/Ti顆粒銅基復合材料的微觀組織與力學性能
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太原理工大學 材料科學與工程學院

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國家自然科學基金項目（面上項目，重點項目，重大項目）


Microstructure Characteristics and Mechanical Properties of Cu Matrix Composites Containing Micro-B4C/nano-Ti Particulates
Author:
Affiliation:

College of Materials Science and Engineering,Taiyuan University of Technology

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    采用高能球磨(HEBM)和放電等離子燒結(SPS)工藝成功制備出微納B4C/Ti顆粒增強銅基復合材料(CTBCs),通過X射線衍射(XRD)、光學顯微鏡(OM)、掃描電子顯微鏡(SEM)以及能譜(EDS)等測試手段對其微觀組織形貌進行表征。結果表明,(B4C+Ti)顆粒在基體中均勻分布,增強體與銅基體界面結合良好,且其結合形式為冶金結合和機械結合并存。采用阿基米德排水法測定出燒結態(tài)試樣的致密度。復合材料的顯微硬度、拉伸屈服強度、抗拉強度和延伸率等力學性能相較于純銅試樣得到顯著提高,這主要歸因于載荷傳遞、細化晶粒與熱錯配等強化機制。復合材料的拉伸斷口表現(xiàn)出明顯的韌性斷裂特征。

    Abstract:

    Micro-B4C/nano-Ti hybrid particulates reinforced copper matrix composites (CTBCs) were successfully prepared by high energy ball milling (HEBM) and spark plasma sintering (SPS). The microstructures and morphologies were characterized by X-ray diffraction (XRD), optical microscopy (OM), and scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS). The results demonstrate that presence of uniformly distributed (B4C+Ti) particles and a good interfacial bond between reinforcement and the Cu matrix. Besides, the interface bondingSmechanism was metallurgical bonding and mechanical bonding. The relative density of the as-SPSed samples was tested by Archimedes drainage method. Mechanical properties (microhardness, tensile yield strength, ultimate tensile strength and elongation to fracture) of CTBCs were significantly improved in comparison to the pure copper, which was mainly due to the load transfer, grain refinement and thermal. Finally, the fracture surface of the tensile sample presented ductile fractures.

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安德成,王文先,陳洪勝,譚敏波,王苗.含微納B4C/Ti顆粒銅基復合材料的微觀組織與力學性能[J].稀有金屬材料與工程,2019,48(2):411~418.[An Decheng, Wang Wenxian, Chen Hongsheng, Tan Minbo, Wang Miao. Microstructure Characteristics and Mechanical Properties of Cu Matrix Composites Containing Micro-B4C/nano-Ti Particulates[J]. Rare Metal Materials and Engineering,2019,48(2):411~418.]
DOI：10.12442/j. issn.1002-185X.20170680

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  • 收稿日期:2017-08-01
  • 最后修改日期:2017-08-23
  • 錄用日期:2017-09-11
  • 在線發(fā)布日期: 2019-03-15
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