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大氣等離子噴涂TiB2-TiC-Co涂層的組織與性能
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1.哈爾濱理工大學 材料科學與化學工程學院;2.中科院長春應用化學研究所

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國家自然科學基金(51602081)


Microstructure and Properties of TiB2-TiC-Co Coatings by Atmospheric Plasma Spraying
Author:
Affiliation:

1.School of Materials Science and Chemical Engineering,Harbin University of Science and Technology;2.Changchun Institute of Applied Chemistry,Chinese Academy of Sciences

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    摘要:

    利用Co-Ti-B4C自蔓延體系合成TiB2-TiC-Co復合陶瓷粉末，并結合大氣等離子噴涂技術在Q235 鋼基體表面制備TiB2-TiC-Co陶瓷涂層，研究了自蔓延產物和涂層的相組成、顯微組織，以及涂層的結合強度和抗磨損性能。結果表明：Co-Ti-B4C體系自蔓延產物的物相中，除了少量剩余的NaCl添加劑衍射峰外，主要由TiB2和TiC陶瓷相的強衍射峰組成；產物斷面中，兩相陶瓷顆粒細小。隨Co含量增加，TiB2-TiC-Co涂層表面盤狀組織增多，表面逐漸平滑，截面涂層厚度均勻，組織致密性逐漸增加；結合強度和耐滑動磨損性能呈先升高后降低的變化趨勢。Co含量為10wt.%時，涂層的結合強度和耐滑動磨損性能最好，涂層的滑動磨損機制主要為粘著磨損和層狀剝落磨損。

    Abstract:

    TiB2-TiC-Co composite powders were successfully synthesized from a Co-Ti-B4C system by self-propagating high-temperature synthesis (SHS), and TiB2-TiC-Co cermet coatings were produced on a Q235 steel substrate by atmospheric plasma spraying (APS). Phase composition and microstructure of the SHS products and APS coatings were investigated, and bonding strength and wear resistance of the coatings were examined. The results show that the phase of Co-Ti-B4C SHS products mainly consists of strong TiB2 and TiC diffraction peaks in addition to the diffraction peaks of a small amount of remained NaCl additive. Both TiB2 and TiC ceramic particles are fine. With the increase of Co content, the disk-like splats increase on the surface of TiB2-TiC-Co coating, and the surface becomes smooth gradually. The thickness of the coatings are uniform, and the densification is improved. The bonding strength and sliding wear resistance present the trend of first increasing and then decreasing. The bonding strength and sliding wear resistance of the coating reaches optimum value with 10 wt.% Co content. The wear mechanism of the coating is mainly adhesive wear and lamellar peeling wear.

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馬寶霞,徐陽,徐敦昊,鄒兵林.大氣等離子噴涂TiB2-TiC-Co涂層的組織與性能[J].稀有金屬材料與工程,2023,52(8):2791~2799.[Ma Baoxia, XuYang, Xu Dunhao, Zou Binglin. Microstructure and Properties of TiB2-TiC-Co Coatings by Atmospheric Plasma Spraying[J]. Rare Metal Materials and Engineering,2023,52(8):2791~2799.]
DOI：10.12442/j. issn.1002-185X.20230028

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  • 收稿日期:2023-01-16
  • 最后修改日期:2023-03-23
  • 錄用日期:2023-04-06
  • 在線發(fā)布日期: 2023-08-28
  • 出版日期: 2023-08-24