2O3@Ni/Fe復合材料;放電等離子燒結;摩擦磨損"/> 2O3表面制備了Ni鍍層，將所制得的Ni包覆Al2O3顆粒（Al2O3p@Ni）作為鐵基體的增強顆粒，采用SPS法制備了鍍鎳氧化鋁增強鐵基復合材料（Al2O3p@Ni/Fe）。通過優(yōu)化化學鍍工藝，使得Al2O3表面被Ni層均勻覆蓋。Ni鍍層呈典型的花椰菜狀結構，尺寸為1~4 μm，施鍍過程中鎳首先沉積在Al2O3表面的凹坑和孔洞中，然后逐漸長大向外擴展。Ni鍍層與Al2O3緊密結合，厚度可達100 μm。在燒結過程中，Ni鍍層不僅提高了Al2O3與鐵基體之間的潤濕性，而且促進了Al2O3與鐵基體在界面處的擴散和反應。最終，通過機械結合、擴散反應和冶金反應形成了Al2O3/NiAl2O4/(Al0.8Cr0.2)2O3/NiFe2O4/Ni/鐵基體界面，大大提高了界面結合強度。同時，對Al2O3p@Ni/Fe復合材料和無表面處理的Al2O3p/Fe復合材料進行了磨損試驗，結果表明，與Al2O3p/Fe復合材料相比，Al2O3p@Ni/Fe復合材料的磨損質量損失降低了50%，摩擦系數降低了12.5%。Al2O3p@Ni/Fe復合材料的耐磨性明顯提高。"/>

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鎳包覆氧化鋁增強鐵基復合材料的界面行為及其耐磨性
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1.太原理工大學 材料科學與工程學院，山西 太原 030024;2.太原理工大學 機械與運載工程學院，山西 太原 030024;3.太原理工大學 航空航天學院，山西 太原 030024;4.賓夕法尼亞州立大學 伊利比倫德學院 機械工程系，美國 賓夕法尼亞州 16563

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基金項目:

國家自然科學基金項目（面上項目，重點項目，重大項目）


Interaction Mechanism and Wear Resistance of Ni-encapsulated Al2O3 Particles Reinforced Iron Matrix Composites
Author:
Affiliation:

1.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;2.College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024, China;3.College of Aeronautics and Astronautics, Taiyuan University of Technology, Taiyuan 030024, China;4.Department of Mechanical Engineering, Penn State Erie, The Behrend College, PA 16563, USA

Fund Project:

National Natural Science Foundation of China (51775366)

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    摘要:

    采用化學沉積法在Al2O3表面制備了Ni鍍層，將所制得的Ni包覆Al2O3顆粒（Al2O3p@Ni）作為鐵基體的增強顆粒，采用SPS法制備了鍍鎳氧化鋁增強鐵基復合材料（Al2O3p@Ni/Fe）。通過優(yōu)化化學鍍工藝，使得Al2O3表面被Ni層均勻覆蓋。Ni鍍層呈典型的花椰菜狀結構，尺寸為1~4 μm，施鍍過程中鎳首先沉積在Al2O3表面的凹坑和孔洞中，然后逐漸長大向外擴展。Ni鍍層與Al2O3緊密結合，厚度可達100 μm。在燒結過程中，Ni鍍層不僅提高了Al2O3與鐵基體之間的潤濕性，而且促進了Al2O3與鐵基體在界面處的擴散和反應。最終，通過機械結合、擴散反應和冶金反應形成了Al2O3/NiAl2O4/(Al0.8Cr0.2)2O3/NiFe2O4/Ni/鐵基體界面，大大提高了界面結合強度。同時，對Al2O3p@Ni/Fe復合材料和無表面處理的Al2O3p/Fe復合材料進行了磨損試驗，結果表明，與Al2O3p/Fe復合材料相比，Al2O3p@Ni/Fe復合材料的磨損質量損失降低了50%，摩擦系數降低了12.5%。Al2O3p@Ni/Fe復合材料的耐磨性明顯提高。

    Abstract:

    Ni coating was prepared on the surface of Al2O3 by chemical deposition method. Ni coated Al2O3 particles (Al2O3p@Ni) was used as particle-reinforcement for iron matrix. The Al2O3p@Ni/Fe composites were prepared by SPS. Results show that by optimizing electroless plating process, the surface of Al2O3 is uniformly covered by Ni. Ni coating presents a typical cauliflower structure with the size of 1~4 μm, which is deposited in pits and holes on the surface of Al2O3 and then gradually extends outwardly. The thickness of Ni layer is up to 100.55 μm, and Ni coating is closely bounded to Al2O3. In the process of sintering, Ni coatings not only improve the wettability between Al2O3 and iron matrix, but also promote the diffusion and reaction of Al2O3 and iron matrix at the interface. Finally, Al2O3/NiAl2O4/(Al0.8Cr0.2)2O3/NiFe2O4/Ni/iron matrix interface layer is formed by mechanical bonding, interdiffusion and chemical reactions, which can improve interface bonding strength greatly. The wear tests of Al2O3p@Ni/Fe composites and Al2O3p/Fe composites were carried out. Compared with Al2O3p/Fe composites, the wear mass loss of Al2O3p@Ni/Fe composites is decreased by 50%, and the friction coefficient is decreased by 12.5%. The wear resistance of Al2O3p@Ni/Fe composites is greatly improved.

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尚方靜,王文先,楊濤,劉瑞峰,周峻.鎳包覆氧化鋁增強鐵基復合材料的界面行為及其耐磨性[J].稀有金屬材料與工程,2022,51(2):422~428.[Shang Fangjing, Wang Wenxian, Yang Tao, Liu Ruifeng, Zhou Jun. Interaction Mechanism and Wear Resistance of Ni-encapsulated Al2O3 Particles Reinforced Iron Matrix Composites[J]. Rare Metal Materials and Engineering,2022,51(2):422~428.]
DOI：10.12442/j. issn.1002-185X.20200982

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  • 收稿日期:2020-12-18
  • 最后修改日期:2022-02-21
  • 錄用日期:2021-04-15
  • 在線發(fā)布日期: 2022-03-03
  • 出版日期: 2022-02-28