利用 SPS 技术初步机械活化形成 VKNA-4U 粉末合金

IF 0.8 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING Metallurgist Pub Date : 2024-09-05 DOI:10.1007/s11015-024-01781-8

Liliya I. Shevtsova, Maksim A. Esikov, Vladimir N. Malikov, Ruslan I. Kuz’min

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摘要

本文介绍了基于铝化镍的 VKNA-4U 合金的结构研究和弯曲强度评估结果。这是首次通过对初始成分的机械活化粉末进行火花等离子烧结来生产这种合金。粉末的机械活化持续了 1.5、3.5 和 5 分钟。通过 X 射线衍射分析，确定了这种合金的最佳机械活化时间（3 分 30 秒）。为了获得致密的低缺陷工件，VKNA-4U 合金在加热温度为 1100 ℃、压力为 40 兆帕、保温时间为 5 分钟的条件下进行烧结。这种材料在室温下的极限弯曲强度（σbend = 1215 ± 65 MPa）高于在类似条件下生产的 Ni3Al 金属间化合物的强度，显微硬度为 690 ± 25 HV。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Formation of VKNA-4U powder alloy using the SPS technology with preliminary mechanical activation

The results of structural studies and assessment of the bending strength of a VKNA-4U alloy based on nickel aluminide are presented. It is for the first time that this alloy was produced by spark plasma sintering of mechanically activated powders of the starting components. The mechanical activation of the powders lasted for 1.5, 3.5, and 5 min. X‑ray diffraction analysis was performed to determine the optimal duration (3 min 30 sec) of mechanical activation for this alloy. To obtain a dense low-defect workpiece, the VKNA-4U alloy was sintered at a heating temperature of 1100 °C, a pressure of 40 MPa, and a holding time of 5 min. This material has higher ultimate bending strength at room temperature (σ_bend = 1215 ± 65 MPa) than the strength of Ni₃Al intermetallic compound produced in similar conditions and microhardness 690 ± 25 HV.

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来源期刊

Metallurgist 工程技术-冶金工程

CiteScore

1.50

自引率

44.40%

发文量

151

审稿时长

4-8 weeks

期刊介绍： Metallurgist is the leading Russian journal in metallurgy. Publication started in 1956. Basic topics covered include: State of the art and development of enterprises in ferrous and nonferrous metallurgy and mining; Metallurgy of ferrous, nonferrous, rare, and precious metals; Metallurgical equipment; Automation and control; Protection of labor; Protection of the environment; Resources and energy saving; Quality and certification; History of metallurgy; Inventions (patents).