高合金增强矩阵复合材料的相位稳定性和微观结构特性,通过火花等离子烧结巩固
Smith Salifu1, Peter Apata Olubambi1, Linda Teffo2
1Centre for Nanoengineering and Advanced Materials, University of Johannesburg, South Africa.
Heliyon
|February 1, 2024
概括
发光等离子烧结 (SPS) 合并高合金 (HEA) 增强矩阵复合材料. 添加HEA提高了微硬度,但密度略有降低,形成了新的相和扩散层.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是一种金工业.
- 复合材料 复合材料 复合材料
背景情况:
- 高合金 (HEA) 由于其多元素组成,具有独特的特性.
- 矩阵复合材料被广泛使用,但可以从增强的机械性能中受益.
- 火花等离子烧结 (SPS) 技术可以快速巩固先进材料.
研究的目的:
- 为了研究使用SPS的Cr20Mn20Ni20Cu20Nb10Co10高合金 (HEA) 增强矩阵复合材料的整合.
- 在烧结过程中分析相位稳定性和微观结构演变.
- 评估HEA增强对基复合材料密度和微硬度的影响.
主要方法:
- 粉末金方法使用火花等离子烧结 (SPS).
- 根据相稳定性和预测表达式选择HEA粉末成分.
- 使用X射线衍射 (XRD) 的微观结构特征和介散层的分析.
- 烧结复合材料的密度和微硬度测量.
主要成果:
- 通过SPS成功地巩固了HEA增强的矩阵复合材料.
- 在基质和HEA颗粒之间形成一个互扩散层.
- 由于烧结过程中的反应,新相 (BCC,FCC,金属间) 的发展.
- 密度随着HEA含量增加 (98.6%至98.1%) 略有下降.
- 微硬度随着HEA含量增加而显著增加 (35HV至96.0HV).
结论:
- SPS是巩固HEA增强基复合材料的有效方法.
- 添加HEA导致显著的微结构变化和微硬度的改善.
- 密度和微硬度之间的权衡应该考虑特定应用.
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