通过放电等离子烧结原位合成（Mo，Cr）Si复合材料。

In Situ Synthesis of (Mo,Cr)Si Composites by Spark Plasma Sintering.

作者信息

Wang Yue-Yao, Zhang Guo-Hua

机构信息

State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China.

出版信息

Materials (Basel). 2024 Aug 19;17(16):4105. doi: 10.3390/ma17164105.

DOI:10.3390/ma17164105

PMID:39203283

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11356213/

Abstract

This research investigated the impact of Cr content on the properties of (Mo,Cr)Si composites. Composites with CrSi molar fractions ranging from 0% to 10% were fabricated using spark plasma sintering (SPS). The study undertook a systematic analysis of the surface morphology, phase composition, mechanical properties, and high-temperature oxidation resistance of the sintered samples across different compositions. Notably, the (Mo,Cr)Si composite sintered at 1400 °C exhibited enhanced properties, including a Vickers hardness of 11.6 GPa, a fracture toughness of 4.6 MPa·m, and a flexural strength of 397 MPa. Upon oxidation at 1500 °C, the (Mo,Cr)Si composites formed a protective oxide layer comprised of SiO and CrO. It was found that the generation and thickening of the protective oxide layer was promoted by the addition of moderate amounts of Cr to MoSi.

摘要

本研究调查了Cr含量对(Mo,Cr)Si复合材料性能的影响。使用放电等离子烧结(SPS)制备了CrSi摩尔分数范围为0%至10%的复合材料。该研究对不同成分烧结样品的表面形貌、相组成、力学性能和高温抗氧化性进行了系统分析。值得注意的是，在1400℃烧结的(Mo,Cr)Si复合材料表现出增强的性能，包括维氏硬度为11.6 GPa、断裂韧性为4.6 MPa·m以及抗弯强度为397 MPa。在1500℃氧化时，(Mo,Cr)Si复合材料形成了由SiO和CrO组成的保护性氧化层。研究发现，向MoSi中添加适量的Cr可促进保护性氧化层的生成和增厚。