Effect of Si additions on the Al2O3 grain refinement upon oxidation of Cr2AlC MAX phase

被引：15

作者：

Shang, Lin ^{[1
]}

Gokuldoss, Pradeep Konda ^{[1
]}

Sandloebes, Stefanie ^{[2
]}

Baben, Moritz to ^{[1
,3
]}

Schneider, Jochen M. ^{[1
]}

机构：

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

[2] Rhein Westfal TH Aachen, Inst Metallkunde & Metallphys, Kopernikusstr 14, D-52074 Aachen, Germany

[3] GTT Technol, Kaiserstr 103, D-52134 Herzogenrath, Germany

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2017年 / 37卷 / 04期

关键词：

M(n+1)AX(n) phases; Oxidation; Alloying; Atom probe tomography; Combinatorial magnetron sputtering; M(N+1)AX(N) PHASES; BEHAVIOR; TI3ALC2; GROWTH;

D O I：

10.1016/j.jeurceramsoc.2016.11.050

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 effect of Si additions on the oxidation behavior of Cr2AlC based coatings is investigated. Oxidation experiment was performed at 1120 degrees C in air for 4h for Cr2AlC and Cr-2 Al1-xSixC (0 <x <= 0.06) coatings. The crystal structure, microstructure and chemical composition of the as-deposited as well as oxidized coatings have been investigated. Alloying Cr(2)AIC with up to 0.7 at.% Si causes an increase in Al2O3 scale thickness by up to 40 +/- 17%. Electron microscopy and atom probe tomography data support the notion that the here reported Si concentration induced 40% increase in Al2O3 layer thickness (during oxidation at 1120 degrees C for 4 h) is enabled by the Si concentration induced, and hence concomitant, increase in nucleation density of Al2O3. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1339 / 1347

页数：9

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