Scholarlink

<p>AZ91D/Tantalum carbide (TaC) magnesium composites containing 2.5 wt.%, 5 wt.%, and 7.5 wt.% of TaC particles were fabricated by following the ultrasonication stir–squeeze casting method. A pin-on-disc tribometer was used to investigate the tribo-behavior of the materials at ambient and elevated temperatures. In room-temperature wear tests, normal loads (12.5 N, 25 N, 37.5 N, 50 N) and sliding speeds (0.25, 0.50, 0.75, 1&#xa0;m/s) were applied to find the specific wear rate (SWR) and coefficient of friction (COF). The elevated temperature test was carried out between 50°C and 200°C. The addition of 2.5 wt.%, 5 wt.%, and 7.5 wt.% TaC increased the hardness by approximately 7.04%, 14.08%, and 29.58%, respectively. The porosity of the composites varied from 0.27% to 0.93%. As the applied load and speed increased, a decreasing trend for SWR and COF was observed in ambient conditions. The SWR and COF were minimum at 7.5 wt.%, 50 N, and 1&#xa0;m/s, and maximum at 2.5 wt.%, 12.5 N, and 0.25&#xa0;m/s. The SWR of materials increased with the increase in the wear test temperature. The endurance temperature of mild to severe wear transition was 150°C at 2.5 wt.% and 175°C at both 5 wt.% and 7.5 wt.%. Wear mechanisms comprised abrasion, oxidation, and delamination majorly affected tribo-behavior.</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

Impact of Tantalum Carbide on Ambient and Elevated Temperature Tribo-behavior of Cast Mg-AZ91D Composites

  • 期刊论文

  • 发表日期：

    2025年2月18日

查看全文
  • A. Gnanavelbabu,
  • K. T. Sunu Surendran

摘要

AZ91D/Tantalum carbide (TaC) magnesium composites containing 2.5 wt.%, 5 wt.%, and 7.5 wt.% of TaC particles were fabricated by following the ultrasonication stir–squeeze casting method. A pin-on-disc tribometer was used to investigate the tribo-behavior of the materials at ambient and elevated temperatures. In room-temperature wear tests, normal loads (12.5 N, 25 N, 37.5 N, 50 N) and sliding speeds (0.25, 0.50, 0.75, 1 m/s) were applied to find the specific wear rate (SWR) and coefficient of friction (COF). The elevated temperature test was carried out between 50°C and 200°C. The addition of 2.5 wt.%, 5 wt.%, and 7.5 wt.% TaC increased the hardness by approximately 7.04%, 14.08%, and 29.58%, respectively. The porosity of the composites varied from 0.27% to 0.93%. As the applied load and speed increased, a decreasing trend for SWR and COF was observed in ambient conditions. The SWR and COF were minimum at 7.5 wt.%, 50 N, and 1 m/s, and maximum at 2.5 wt.%, 12.5 N, and 0.25 m/s. The SWR of materials increased with the increase in the wear test temperature. The endurance temperature of mild to severe wear transition was 150°C at 2.5 wt.% and 175°C at both 5 wt.% and 7.5 wt.%. Wear mechanisms comprised abrasion, oxidation, and delamination majorly affected tribo-behavior.