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添加中间层对WC-Co钻石涂层化碳酸工具材料接口粘合性能的影响
Junru Yang1, Yanping Yue1, Hao Lv1
1College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
Molecules (Basel, Switzerland)
|August 26, 2023
概括
添加像SiC这样的中间层显著提高了涂上钻石的WC-Co化碳化物 (DCCC) 的粘合强度. 碳化 (SiC) 证明是最有效的,改善了接口粘附性和化学结合,以获得卓越的材料性能.
科学领域:
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
- 计算材料科学科学 计算材料科学
背景情况:
- 用钻石涂层的WC-Co水泥化碳化物 (DCCC) 对于苛刻的应用至关重要.
- 提高DCCC的接口粘附度对于提高耐用性和性能至关重要.
- 了解接口粘合机制是优化涂层技术的关键.
研究的目的:
- 为了研究各种中间层对DCCC的接口粘附的影响.
- 通过计算建模和分析DCCC与不同接口结构的结合特性.
- 确定最佳的中间层,以提高DCCC的机械性能.
主要方法:
- 构建具有和没有中间层 (TiC,TiN,CrN,SiC) 的DCCC接口模型.
- 第一个原则计算,以确定粘附工作和分析接口粘合.
- 电荷密度差异和状态密度计算以探测电子结构和结合.
主要成果:
- 与没有中间层的DCCC相比,所有四个中间层 (SiC,CrN,TiC,TiN) 都增加了接口粘附工作.
- 根据提高粘附力的有效性,中间层的排名是SiC > CrN > TiC > TiN.
- 中间层促进了电子云的重叠,形成了更稳定的化学键,增强了接口键. 钻石/SiC接口表现出最强的结合,其特点是最短的结合长度和最大的共振峰值能量区域.
结论:
- 中间层显著提高了DCCC的接口粘合性能.
- 碳化 (SiC) 是改善DCCC接口粘附的最有效的中间层,而TiN是最不有效的.
- 增强的结合归因于电荷分布的改善,电子轨道重叠的增加,以及在界面上的更强的化学键.
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