Experimental study of the Mn-Re system

Y. Graz; J. M. Fiorani; N. David; J. M. Joubert; M. Vilasi

doi:10.1016/j.jallcom.2013.05.154

Experimental study of the Mn-Re system

Y. Graz, J. M. Fiorani, N. David, J. M. Joubert, M. Vilasi

Research output: Contribution to journal › Article › peer-review

Abstract

Rhenium (Re) is used as an alloying element in Ni based superalloys but promotes the formation of fragile intermetallic compounds in many systems. The thermodynamic databases that allow the modeling of the properties of Ni based alloys are still incomplete and further data has to be integrated. In this context, we propose a new characterization of the system Mn-Re for temperatures below 1150°C. We evidenced the existence of r and v (aMn) Frank-Kasper phases with very large solubility domains. We took a peculiar attention to the atom distribution in both phases and structural analyses (Rietveld refinement) reveal that Re has a strong preference for atomic sites with high CN. In addition, r phase molar enthalpy of formation was measured by drop calorimetry at 1150°C (40 and 55 at.% Re).

Original language	English
Pages (from-to)	344-349
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	575
DOIs	https://doi.org/10.1016/j.jallcom.2013.05.154
Publication status	Published - 1 Jan 2013
Externally published	Yes

Keywords

Enthalpy of formation
Frank-kasper phases
Mn-re system
Phase diagram
Rietveld refinement

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10.1016/j.jallcom.2013.05.154

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title = "Experimental study of the Mn-Re system",

abstract = "Rhenium (Re) is used as an alloying element in Ni based superalloys but promotes the formation of fragile intermetallic compounds in many systems. The thermodynamic databases that allow the modeling of the properties of Ni based alloys are still incomplete and further data has to be integrated. In this context, we propose a new characterization of the system Mn-Re for temperatures below 1150°C. We evidenced the existence of r and v (aMn) Frank-Kasper phases with very large solubility domains. We took a peculiar attention to the atom distribution in both phases and structural analyses (Rietveld refinement) reveal that Re has a strong preference for atomic sites with high CN. In addition, r phase molar enthalpy of formation was measured by drop calorimetry at 1150°C (40 and 55 at.\% Re).",

keywords = "Enthalpy of formation, Frank-kasper phases, Mn-re system, Phase diagram, Rietveld refinement",

author = "Y. Graz and Fiorani, \{J. M.\} and N. David and Joubert, \{J. M.\} and M. Vilasi",

year = "2013",

month = jan,

day = "1",

doi = "10.1016/j.jallcom.2013.05.154",

language = "English",

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pages = "344--349",

journal = "Journal of Alloys and Compounds",

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}

TY - JOUR

T1 - Experimental study of the Mn-Re system

AU - Graz, Y.

AU - Fiorani, J. M.

AU - David, N.

AU - Joubert, J. M.

AU - Vilasi, M.

PY - 2013/1/1

Y1 - 2013/1/1

N2 - Rhenium (Re) is used as an alloying element in Ni based superalloys but promotes the formation of fragile intermetallic compounds in many systems. The thermodynamic databases that allow the modeling of the properties of Ni based alloys are still incomplete and further data has to be integrated. In this context, we propose a new characterization of the system Mn-Re for temperatures below 1150°C. We evidenced the existence of r and v (aMn) Frank-Kasper phases with very large solubility domains. We took a peculiar attention to the atom distribution in both phases and structural analyses (Rietveld refinement) reveal that Re has a strong preference for atomic sites with high CN. In addition, r phase molar enthalpy of formation was measured by drop calorimetry at 1150°C (40 and 55 at.% Re).

AB - Rhenium (Re) is used as an alloying element in Ni based superalloys but promotes the formation of fragile intermetallic compounds in many systems. The thermodynamic databases that allow the modeling of the properties of Ni based alloys are still incomplete and further data has to be integrated. In this context, we propose a new characterization of the system Mn-Re for temperatures below 1150°C. We evidenced the existence of r and v (aMn) Frank-Kasper phases with very large solubility domains. We took a peculiar attention to the atom distribution in both phases and structural analyses (Rietveld refinement) reveal that Re has a strong preference for atomic sites with high CN. In addition, r phase molar enthalpy of formation was measured by drop calorimetry at 1150°C (40 and 55 at.% Re).

KW - Enthalpy of formation

KW - Frank-kasper phases

KW - Mn-re system

KW - Phase diagram

KW - Rietveld refinement

U2 - 10.1016/j.jallcom.2013.05.154

DO - 10.1016/j.jallcom.2013.05.154

M3 - Article

AN - SCOPUS:84879475330

SN - 0925-8388

VL - 575

SP - 344

EP - 349

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Experimental study of the Mn-Re system

Abstract

Keywords

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