Scholarlink

<p>In this study, an aqueous suspension containing fine aluminum oxide and coarser titanium nitride (TiN) powders was prepared and processed using high-velocity suspension flame spraying (HVSFS) to produce thick TiN/ Al<sub>2</sub>O<sub>3</sub> composite coatings (&gt;50&#xa0;µm). The influence of spraying parameters, such as total gas flow and flame stoichiometry, on the microstructure, phase composition, mechanical, and tribological properties was investigated. The results demonstrate that TiN can be successfully deposited under atmospheric conditions using the HVSFS process, achieving a homogeneous distribution of TiN particles within the alumina matrix. This composite structure led to a significant increase in microhardness. Furthermore, the TiN/ Al<sub>2</sub>O<sub>3</sub> coatings produced with <i>λ</i> = 0.8 exhibited improved wear resistance and a reduced coefficient of friction compared to pure Al<sub>2</sub>O<sub>3</sub> coatings.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Microstructure and Tribological Behavior of TiN/ Al2O3 Composite Coatings Produced by High-Velocity Suspension Flame Spraying (HVSFS)

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月24日

查看全文
  • Ebru Gyoktepeliler Akin,
  • Luca Bortolotti,
  • Edoardo Rossi,
  • Milena Pazzi,
  • Andreas Killinger,
  • Luca Lusvarghi,
  • Giovanni Bolelli

摘要

In this study, an aqueous suspension containing fine aluminum oxide and coarser titanium nitride (TiN) powders was prepared and processed using high-velocity suspension flame spraying (HVSFS) to produce thick TiN/ Al2O3 composite coatings (>50 µm). The influence of spraying parameters, such as total gas flow and flame stoichiometry, on the microstructure, phase composition, mechanical, and tribological properties was investigated. The results demonstrate that TiN can be successfully deposited under atmospheric conditions using the HVSFS process, achieving a homogeneous distribution of TiN particles within the alumina matrix. This composite structure led to a significant increase in microhardness. Furthermore, the TiN/ Al2O3 coatings produced with λ = 0.8 exhibited improved wear resistance and a reduced coefficient of friction compared to pure Al2O3 coatings.