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Microstructural and analytical study of boron-doped Co-Re-Cr alloys using transmission electron microscopy and electron energy loss spectroscopy

Title data

Bölitz, Marie-Christin ; Brunner, Martin ; Völkl, Rainer ; Mukherji, Debashis ; Rösler, Joachim ; Glatzel, Uwe:
Microstructural and analytical study of boron-doped Co-Re-Cr alloys using transmission electron microscopy and electron energy loss spectroscopy.
In: International Journal of Materials Research. Vol. 103 (May 2012) Issue 5 . - pp. 554-558.
ISSN 1862-5282
DOI: https://doi.org/10.3139/146.110729

Official URL: Volltext

Abstract in another language

The development of corrosion-resistant alloys with sustained thermal and mechanical stabilities is the focus of current research on high-temperature alloys. It has been shown that the creep behavior and oxidation resistance of Co — Re alloys can be improved by small additions of, e. g., B and Zr. To understand the effect of these elements on mechanical properties, we have characterized the phases and microstructures in the Co — Re — Cr system using transmission electron microscopy. Zr forms isolated large crystals in the matrix, while B is accommodated in small intergranular (Cr,Re)2B borides. The incorporation of up to 23 at.% Re into the Cr2B structure results in increased unit cell constants. The elongated borides occur pervasively along grain boundaries, suggesting that they improve the grain boundary cohesion and thereby the mechanical properties of Co — Re — Cr alloys.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: High-temperature materials; Co — Re — Cr alloys; Transmission electron microscopy; Microstructure
Institutions of the University: Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Metals and Alloys
Faculties > Faculty of Engineering Science > Chair Metals and Alloys > Chair Metals and Alloys - Univ.-Prof. Dr.-Ing. Uwe Glatzel
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 09 Nov 2015 07:58
Last Modified: 23 Feb 2018 07:00
URI: https://eref.uni-bayreuth.de/id/eprint/5167