超难熔 Ta-Hf-C 三元合金薄膜的强摩擦机械性能和抗热腐蚀性能。

Robust tribo-mechanical and hot corrosion resistance of ultra-refractory Ta-Hf-C ternary alloy films.

机构信息

CIC biomaGUNE, Paseo Miramón 182, 20009, Donostia-San Sebastian, Spain.

NanoBioMedical Center, Adam Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland.

出版信息

Sci Rep. 2017 Jun 8;7(1):3080. doi: 10.1038/s41598-017-03181-2.

DOI:10.1038/s41598-017-03181-2

PMID:28596544

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5465092/

Abstract

In this work we report the hot corrosion properties of binary and ternary films of the Ta-Hf-C system in VO-NaSO (50%wt.-50%wt.) molten salts at 700 °C deposited on AISI D3 steel substrates. Additionally, the mechanical and nanowear properties of the films were studied. The results show that the ternary alloys consist of solid solutions of the TaC and HfC binary carbides. The ternary alloy films have higher hardness and elastic recoveries, reaching 26.2 GPa and 87%, respectively, and lower nanowear when compared to the binary films. The corrosion rates of the ternary alloys have a superior behavior compared to the binary films, with corrosion rates as low as 0.058 μm/year. The combination and tunability of high hardness, elastic recovery, low nanowear and an excellent resistance to high temperature corrosion demonstrates the potential of the ternary Ta-Hf-C alloy films for applications in extreme conditions.

摘要

在这项工作中，我们报告了 Ta-Hf-C 二元和三元膜在 700°C 的 VO-NaSO（50%wt.-50%wt.）熔盐中的热腐蚀性能，这些膜沉积在 AISI D3 钢基底上。此外，还研究了这些膜的机械性能和纳米磨损性能。结果表明，三元合金由 TaC 和 HfC 二元碳化物的固溶体组成。与二元膜相比，三元合金膜具有更高的硬度和弹性恢复率，分别达到 26.2 GPa 和 87%，并且纳米磨损率更低。与二元膜相比，三元合金的腐蚀速率具有更好的性能，腐蚀速率低至 0.058 μm/年。高硬度、弹性恢复、低纳米磨损和高温腐蚀的优异结合和可调节性证明了三元 Ta-Hf-C 合金膜在极端条件下应用的潜力。