1
|
|
2
|
Souissi M, Sluiter MHF, Matsunaga T, Tabuchi M, Mills MJ, Sahara R. Effect of mixed partial occupation of metal sites on the phase stability of γ-Cr 23-xFe x C 6 (x = 0-3) carbides. Sci Rep 2018; 8:7279. [PMID: 29740098 PMCID: PMC5940797 DOI: 10.1038/s41598-018-25642-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 04/25/2018] [Indexed: 11/22/2022] Open
Abstract
The effect of mixed partial occupation of metal sites on the phase stability of the γ-Cr23−xFexC6 (x = 0–3) carbides is explored as function of composition and temperature. Ab initio calculations combined with statistical thermodynamics approaches reveal that the site occupation of the carbides may be incorrectly predicted when only the commonly used approach of full sublattice occupation is considered. We found that the γ-M23C6 structure can be understood as a familiar sodium chloride structure with positively charged rhombic dodecahedron (M(4a) M12(48h)) and negatively charged cubo-octahedron (M8(32f) C6(24e)) super-ion clusters, together with interstitial metal atoms at the 8c sites. The stability of the partially occupied phase can be easily rationalized on the basis of a super-ion analysis of the carbide phase. This new understanding of γ-M23C6 carbides may facilitate further development of high-chromium heat-resistant steels.
Collapse
Affiliation(s)
- Maaouia Souissi
- Research Center for Structural Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan.
| | - Marcel H F Sluiter
- Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, The Netherlands
| | - Tetsuya Matsunaga
- Research Center for Structural Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan.,Department of Materials Science and Engineering, The Ohio State University, 478 Watts Hall, 2041 College Rd, Columbus, OH, 43210, USA
| | - Masaaki Tabuchi
- Research Center for Structural Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
| | - Michael J Mills
- Department of Materials Science and Engineering, The Ohio State University, 478 Watts Hall, 2041 College Rd, Columbus, OH, 43210, USA
| | - Ryoji Sahara
- Research Center for Structural Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan
| |
Collapse
|
3
|
Irregular Homogeneity Domains in Ternary Intermetallic Systems. APPLIED SCIENCES-BASEL 2015. [DOI: 10.3390/app5041570] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
4
|
Crivello JC, Breidi A, Joubert JM. χ and σ Phases in Binary Rhenium–Transition Metal Systems: a Systematic First-Principles Investigation. Inorg Chem 2013; 52:3674-86. [DOI: 10.1021/ic302142w] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jean-Claude Crivello
- Chimie Métallurgique des Terres Rares, Institut de
Chimie et des Matériaux Paris-Est, CNRS, Université Paris-Est, UMR 7182, 2−8 rue Henri Dunant, 94320
Thiais, France
| | - Abedalhasan Breidi
- Chimie Métallurgique des Terres Rares, Institut de
Chimie et des Matériaux Paris-Est, CNRS, Université Paris-Est, UMR 7182, 2−8 rue Henri Dunant, 94320
Thiais, France
| | - Jean-Marc Joubert
- Chimie Métallurgique des Terres Rares, Institut de
Chimie et des Matériaux Paris-Est, CNRS, Université Paris-Est, UMR 7182, 2−8 rue Henri Dunant, 94320
Thiais, France
| |
Collapse
|