2;鋁基復合材料;摩擦磨損"/> 4C和Al-12Si粉末為原材料,通過超聲輔助激光沉積制備了原位TiC-TiB2/Al-12Si鋁基復合材料。采用XRD、EDS分析了復合材料的物相組成,通過OM、SEM觀察了復合材料的微觀組織,利用摩擦磨損試驗機和三維輪廓儀測試了復合材料的磨損性能。結(jié)果表明,隨Ti+B4C含量的增加,ɑ-Al晶粒細化,原位生成的TiB2呈棒狀,且可成為ɑ-Al的異質(zhì)形核核心；原位生成的TiC為150nm多邊形形貌。隨Ti+B4C含量的增加,原位TiC-TiB2/Al-12Si鋁基復合材料的耐磨性提高；未加入Ti+B4C的Al-12Si合金磨損機制為粘著磨損；當Ti+B4C的加入量為8wt.%時,磨損機制為磨粒磨損；當Ti+B4C的加入量為10wt.%時,其磨損機制轉(zhuǎn)變?yōu)檎持p。"/>

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超聲輔助激光沉積原位TiC-TiB2/Al-12Si鋁基復合材料微觀組織及摩擦磨損行為研究
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1華東交通大學 材料科學與工程學院

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國家自然科學基金資助(項目號51865011)，江西省自然科學基金（項目號20212BAB204008）


Investigation on the microstructure and friction wear behavior of in-situ TiC-TiB2/Al-12Si composites fabricated by ultrasonic assisted laser deposition
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1.School of Materials Science and Engineering,East China Jiaotong University

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    摘要:

    以Ti、B4C和Al-12Si粉末為原材料,通過超聲輔助激光沉積制備了原位TiC-TiB2/Al-12Si鋁基復合材料。采用XRD、EDS分析了復合材料的物相組成,通過OM、SEM觀察了復合材料的微觀組織,利用摩擦磨損試驗機和三維輪廓儀測試了復合材料的磨損性能。結(jié)果表明,隨Ti+B4C含量的增加,ɑ-Al晶粒細化,原位生成的TiB2呈棒狀,且可成為ɑ-Al的異質(zhì)形核核心；原位生成的TiC為150nm多邊形形貌。隨Ti+B4C含量的增加,原位TiC-TiB2/Al-12Si鋁基復合材料的耐磨性提高；未加入Ti+B4C的Al-12Si合金磨損機制為粘著磨損；當Ti+B4C的加入量為8wt.%時,磨損機制為磨粒磨損；當Ti+B4C的加入量為10wt.%時,其磨損機制轉(zhuǎn)變?yōu)檎持p。

    Abstract:

    In-situ TiC-TiB2/Al-12Si composites were fabricated by ultrasonic assisted laser deposition using Ti、B4C and Al-12Si powders as precursor materials at different proportions. The phase constitution, microstructure, frictional wear behavior of the composites were analyzed using X-ray diffraction (XRD), energy dispersive spectrum (EDS), optical microscope (OM), scanning electron microscope (SEM), friction and wear testing machine and 3D profile measurement. The results show that the α-Al phase is refined with the increasing of Ti+B4C, rod-like TiB2 synthesized in-situ can act as the heterogeneous nucleation core of α-Al phase. The TiC synthesized in-situ is a polygonal shape of 150nm. The wear resistance of in-situ TiC-TiB2/Al-12Si composites is improved. The wear mechanism of Al-12Si alloy without Ti+B4C addition is adhesive wear, and the wear mechanism of TiC-TiB2/Al-12Si composites changes from adhesive wear to abrasive wear when the addition of Ti+B4C is 8wt.%. When the addition of Ti+B4C is 10wt.%, the wear mechanism of TiC-TiB2/Al-12Si composites is adhesive wear.

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趙明娟,胡勇,符聲啟,趙龍志,焦海濤,劉德佳,唐延川.超聲輔助激光沉積原位TiC-TiB2/Al-12Si鋁基復合材料微觀組織及摩擦磨損行為研究[J].稀有金屬材料與工程,2022,51(12):4632~4639.[Mingjuan Zhao, Yong Hu, Shengqi Fu, Longzhi Zhao, Haitao Jiao, Dejia Liu, Yanchuan Tang. Investigation on the microstructure and friction wear behavior of in-situ TiC-TiB2/Al-12Si composites fabricated by ultrasonic assisted laser deposition[J]. Rare Metal Materials and Engineering,2022,51(12):4632~4639.]
DOI：10.12442/j. issn.1002-185X.20210927

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  • 收稿日期:2021-10-25
  • 最后修改日期:2021-12-27
  • 錄用日期:2022-01-29
  • 在線發(fā)布日期: 2023-01-19
  • 出版日期: 2022-12-30