SPS-assisted Synthesis of SICp reinforced high entropy alloys: reactivity of SIC and effects of pre-mechanical alloying and post-annealing treatment

被引：17

作者：

Colombini, E. ^{[1
]}

Gualtieri, M. Lassinantti ^{[1
]}

Rosa, R. ^{[1
]}

Tarterini, F. ^{[2
]}

Zadra, M. ^{[3
]}

Casagrande, A. ^{[2
]}

Veronesi, P. ^{[1
]}

机构：

[1] Univ Modena & Reggio Emilia, Dept Engn Enzo Ferrari, Via Pietro Vivarelli 10, I-41125 Modena, Italy

[2] Alma Mater Studiorum Univ Bologna, Dept Ind Engn, Bologna, Italy

[3] K4Sint, Pergine Valsugana, Italy

来源：

POWDER METALLURGY | 2018年 / 61卷 / 01期

关键词：

Spark plasma sintering; reinforcement; high entropy alloys; powder metallurgy; SIC; hardness; SILICON-CARBIDE; PHASE-FORMATION; MICROSTRUCTURE; RESISTANCE;

D O I：

10.1080/00325899.2017.1393162

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In this work a traditional high entropy alloy (FeCoNiCrAl) was reinforced by uniformly distributed reactive silicon carbide (SiC) particles by a powder metallurgy synthetic route, using as precursors simply mixed powders or mechanically prealloyed ones. The reactive sintering produced a single isomorphic BCC structure. The sample microstructure resulted equiassic, more homogenous in samples based on prealloyed powders. The instability of SiC in the presence of metal precursors resulted in the formation of more stable carbides and silicides, as well as in carbon diffusion in the high entropy alloy matrix and partially unreacted SiC particles. The formation of these newly formed fine precipitates, as well as the presence of residual SiC were useful to increase the hardness of the alloy.

引用

页码：64 / 72

页数：9