Centrosymmetric to noncentrosymmetric structural transformation in a superconducting high-entropy alloy due to carbon addition
Source abstract
Abstract
四方σ相是过渡金属合金中最常见的物相之一. 然而, σ型高熵合 金中尚未有关于碳添加效应的报道. 在本文中, 我们发现在超导的 Ta10Mo5W30Re35Ru20高熵合金(Tc = 4.87 K)中添加碳会引起结构转变. 结果表明在0 ≤ x ≤ 2时Ta10Mo5W30Re35Ru20Cx高熵合金具有中心对称 的σ型结构, 但在16 ≤ x ≤ 20时转变为非中心对称的β-Mn型结构. 转变 后的β-Mn型高熵合金仍表现出体超导电性且具有更高的Tc (5.34 K)和 接近泡利顺磁极限的上临界场. 此外, 该结构转变归因于碳添加引起价 电子浓度的降低以及晶格畸变和混合熵的增加. 我们的研究结果不仅 提供了高熵合金中中心对称到非中心对称结构转变的罕见例子, 而且 夯实了非金属碳是调节高熵合金结构和物理性质的有效添加剂.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High Entropy Alloys Studies · High-Temperature Coating Behaviors · Metal and Thin Film Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (47)
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