Microstructural and compositional design of Cr2AlC MAX phases and their impact on oxidation resistance

被引：7

作者：

Azina, Clio ^{[1
]}

Poll, Melina ^{[2
]}

Holzapfel, Damian M. ^{[1
]}

Tailleur, Elodie ^{[3
]}

Zuber, Axel ^{[4
]}

Dubois, Sylvain ^{[4
]}

Eklund, Per ^{[5
]}

Gonzalez-Julian, Jesus ^{[2
,6
]}

机构：

[1] Rhein Westfal TH Aachen, Mat Chem, Kopernikusstr 10, D-52074 Aachen, Germany

[2] Forschungszentrum Julich GmbH, Inst Energy & Climate Res Mat Synth & Proc IEK 1, D-52425 Julich, Germany

[3] Univ Lorraine, CRM2, Vandoeuvre Les Nancy, France

[4] Univ Poitiers, Inst PPRIME, CNRS, ENSMA,UPR 3346,TSA 41126, F-86073 Poitiers 9, France

[5] Linkoping Univ, Thin Film Phys Div, Dept Phys Chem & Biol IFM, SE-58183 Linkoping, Sweden

[6] Rhein Westfal TH Aachen, Inst Mineral Engn GHI, Chair Ceram, Forckenbeckstr 33, D-52074 Aachen, Germany

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2024年 / 44卷 / 08期

关键词：

MAX phases; Reactive sintering; Microstructural design; Oxidation; HIGH-TEMPERATURE OXIDATION; COATINGS; BEHAVIOR; POWDER;

D O I：

10.1016/j.jeurceramsoc.2024.02.037

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The oxidation of MAX phases has largely been investigated, but the effect of secondary phases and microstructure is still unclear. We report on the effect of reactive and non-reactive sintering, and starting powders, on the microstructure, phase formation, and chemical composition of Cr2AlC MAX phases. The grain sizes are shown to be sensitive to both the processing method and the starting powders. Secondary phases were observed mostly in reactively sintered samples as Cr7C3 and AlCr2 were identified, and Al contents varied between 24.4 and 28.0 at %. Finally, the oxidation behavior of the produced MAX phases was evaluated after 60 and 120 min at 1100 degrees C. The Al content, the average grain size of the as-sintered samples, and the presence of secondary phases affected the decomposition of the MAX phase into Cr-carbides in the vicinity of the oxide scale and the composition of the oxide scale, respectively.

引用

页码：4895 / 4904

页数：10

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