A high entropy alloy of AlCrFeNiTiZn synthesized through mechanical alloying and sintering

被引：11

作者：

Kalantari, Helia ^{[1
]}

Khayati, Gholam Reza ^{[1
]}

Adeli, Mandana ^{[2
]}

机构：

[1] Shahid Bahonar Univ Kerman, Fac Engn, Dept Met & Mat Sci, Kerman, Iran

[2] Iran Univ Sci & Technol, Sch Met & Mat Engn, Tehran 1684613114, Iran

来源：

INTERMETALLICS | 2023年 / 161卷

关键词：

High entropy alloy; Mechanical alloying; Johnson mehl avrami model; Sintering; THERMAL-STABILITY; PHASE EVOLUTION;

D O I：

10.1016/j.intermet.2023.107981

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Through mechanical alloying, the high entropy alloy AlCrFeNiTiZn (HEA) is produced. After 120 h, the milled powder shows uniform morphology and homogeneous composition, with an average size of 190 nm. Solid solution phases with BCC (A = 2.88 & PLUSMN; 0.02 ?,) and FCC (a = 3.57 & PLUSMN; 0.02 ?,) crystalline structures were confirmed by XRD and TEM in prepared high entropy alloy. There is only one exothermic peak at 290 degrees C on DSC thermogram of the 120 h milled powder. During milling, Johnson Mehl Avrami model effectively explained the kinetics of AlCrFeNiTiZn HEA formation and characterized its type as diffusion-controlled nucleation. In a tube furnace at 800 degrees C, similar phases were also observed after cold pressing and sintering HEA powder. The alloy had a porosity of 14% and a density of 86%.

引用

页数：7

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