Bimodal Microstructure in an AlZrTi Alloy Prepared by Mechanical Milling and Spark Plasma Sintering

被引：3

作者：

Molnarova, Orsolya ^{[1
]}

Duchon, Jan ^{[1
]}

de Prado, Esther ^{[1
]}

Csaki, Stefan ^{[2
]}

Prusa, Filip ^{[3
]}

Malek, Premysl ^{[4
]}

机构：

[1] Czech Acad Sci, Inst Phys, Na Slovance 1999-2, Prague 18221 8, Czech Republic

[2] Czech Acad Sci, Inst Plasma Phys, Za Slovankou 3, Prague 18200 8, Czech Republic

[3] Univ Chem & Technol, Dept Met & Corros Engn, Tech 5, Prague 16628 6, Czech Republic

[4] Charles Univ Prague, Fac Math & Phys, KE Karlovu 5, Prague 12116 2, Czech Republic

来源：

MATERIALS | 2020年 / 13卷 / 17期

关键词：

gas atomization; mechanical milling; spark plasma sintering; microstructure; microhardness; AL; POWDER; STABILITY; BEHAVIOR; PRECIPITATION; EVOLUTION;

D O I：

10.3390/ma13173756

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：

The aim of this study was to prepare a low porosity bulk sample with a fine-grained structure from an AlZrTi alloy. Nanostructured powder particles were prepared by mechanical milling of gas atomized powder. The mechanically milled powder was consolidated using spark plasma sintering technology at 475 degrees C for 6 min using a pressure of 100 MPa. Sintering led to a low porosity sintered sample with a bimodal microstructure. The sintered sample was revealed to be composed of non-recrystallized grains with an approximate size of about 100 nm encompassed by distinct clusters of coarser, micrometer-sized grains. Whereas the larger grains were found to be lean on second phase particles, a high density of second phase particles was found in the areas of fine grains. The microhardness of the milled powder particles was established to be 163 +/- 15 HV0.01, which decreased to a slightly lower value of 137 +/- 25 HV0.01 after sintering.

引用

页数：13

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