Scholarlink

<p>In this study, a hybrid Al7075-nano Al<sub>2</sub>O<sub>3</sub>-TiC composite was fabricated via spark plasma sintering (SPS) using recycled machining chips. This composite includes TiC and Al<sub>2</sub>O<sub>3</sub> additives to synergistically enhance its mechanical properties. The three-point bending strength, hardness, wear, and density of the sintered composites were measured. Key findings demonstrate that the ST6-2.5&#xa0;T-1A composite (2.5 wt.% TiC, 1 wt.% nano-Al<sub>2</sub>O<sub>3</sub>) achieved optimal performance: a Vickers hardness of 1490 HV and three-point bending strength of 682&#xa0;MPa, comparable to T6-treated Al7075. Tribological tests revealed a 40% reduction in wear track depth, attributed to the combined abrasive–delamination resistance of TiC and Nano-sized Al<sub>2</sub>O<sub>3</sub>. However, reinforcement beyond 5–7 wt.% induced particle clustering, degrading mechanical properties due to stress concentration and brittle fracture mechanisms.</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

Investigating the Improvement of Mechanical Properties and Wear Behavior of Al7075-Nano Al2O3-TiC Composite Manufactured by Spark Plasma Sintering

  • 期刊论文

  • 发表日期：

    2026年1月12日

查看全文
  • Mohammad Akhavan Sedighy,
  • Iman Mobasherpour,
  • Mohammad Zakeri

摘要

In this study, a hybrid Al7075-nano Al2O3-TiC composite was fabricated via spark plasma sintering (SPS) using recycled machining chips. This composite includes TiC and Al2O3 additives to synergistically enhance its mechanical properties. The three-point bending strength, hardness, wear, and density of the sintered composites were measured. Key findings demonstrate that the ST6-2.5 T-1A composite (2.5 wt.% TiC, 1 wt.% nano-Al2O3) achieved optimal performance: a Vickers hardness of 1490 HV and three-point bending strength of 682 MPa, comparable to T6-treated Al7075. Tribological tests revealed a 40% reduction in wear track depth, attributed to the combined abrasive–delamination resistance of TiC and Nano-sized Al2O3. However, reinforcement beyond 5–7 wt.% induced particle clustering, degrading mechanical properties due to stress concentration and brittle fracture mechanisms.