铂铑二元合金力学性能与价电子参数的关系

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-01-01 DOI:10.1595/205651323x16527144808494

Mehrdad Zarinejad, Sajjad Rimaz, Y. Tong, K. Wada, F. Pahlevani

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引用次数: 0

摘要

研究了二元Pt-Rh合金的力学性能与合金的价电子比(VER)、价电子数(ev)和平均原子序数(Z)的关系。该合金具有较高的价电子数(9≤ev≤10)和较宽的平均原子序数范围(Z = 45 ~ 78)。发现合金的VER与其力学性能之间存在明显的相关性。随着成分中Rh含量的增加，合金的VER由0.13提高到0.20，合金的硬度、弹性模量和极限抗拉强度均有所提高。在高温下(1500 ~ 1700℃)，随VER的增加，合金的蠕变速率明显降低，而合金固溶体化学中Rh含量的增加使合金在不同温度下的应力破裂时间持续增加。从原子成键的角度讨论了价电子参数对力学性能的影响。

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Dependence of Mechanical Properties of Platinum-Rhodium Binary Alloys on Valence Electron Parameters

Dependence of mechanical properties of binary Pt-Rh alloys on valence electron ratio (VER), number valence electrons (ev), and average atomic number of the alloys (Z) are investigated. The alloys have high number of valence electrons (9 ≤ ev ≤ 10) and a wide range of the average atomic number (Z = 45–78). Clear correlations between VER of the alloys and their mechanical properties are found. By increasing the VER of the alloy from 0.13 to 0.20 following the increase of Rh content in the composition, the hardness, elastic modulus, and ultimate tensile strength of the alloy increases. Creep rates of the selected alloys clearly decrease with increasing VER at high temperatures (1500-1700 ℃C), whilst stress rupture time at different temperatures consistently increases because of higher Rh content in the alloy solid solution chemistry. Dependence of mechanical properties on valence electron parameters is discussed with reference to the atomic bonding.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.