纳克尔灵感 (TiBw-TiB2) /合金复合材料的腐蚀行为由冷成型制造
Jidong Zhang1, Mingfang Qian1,2, Ruiqing Yang3
1School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Materials (Basel, Switzerland)
|June 19, 2024
概括
纳克尔灵感的复合材料显示出更好的强度和柔性. 优化Ti/TiB2比率可以通过减少颗粒间和孔间腐蚀来提高耐腐蚀性,其性能优于传统的合金.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 腐蚀工程 腐蚀工程
背景情况:
- 纳克尔灵感的金属矩阵复合材料提供了卓越的强度和柔性.
- 类似的合金复合材料的冷造具有前景,但由于富含陶的层面,面临着腐蚀挑战.
研究的目的:
- 为了研究纳克尔 (TiBw-TiB2) /Al复合材料的微观结构和腐蚀行为.
- 为了确定最佳的Ti/TiB2比率以提高耐腐蚀性.
主要方法:
- 复合材料的制造使用结造和挤压造.
- 微结构分析和电化学测试 (腐蚀电流密度,颗粒间腐蚀深度).
主要成果:
- 富含和陶的层厚度与增加的Ti/TiB2比率保持一致.
- 较高的Ti/TiB2比率增加了有害的Fe-Ti金属间相,导致坑.
- 3Ti7TiB2复合材料表现出最低的腐蚀电流密度 (15.9μA) 和颗粒间腐蚀深度 (231μm).
结论:
- 3Ti7TiB2复合材料表现出优越的耐腐蚀性,因为它具有稳定,密集的被动化膜.
- 在Al矩阵中观察到晶体间腐蚀,在富含陶的层中观察到坑.
- 富含陶的连续层起到腐蚀通道的作用,降低了复合材料的整体性能.
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