Application of phase diagram calculations to development of new ultra-high temperature structural materials

Ying YANG; B. P. Bewlay; Shuang lin CHEN; Y. A. Chang

doi:10.1016/S1003-6326(07)60284-2

Application of phase diagram calculations to development of new ultra-high temperature structural materials

Ying YANG, B. P. Bewlay, Shuang lin CHEN, Y. A. Chang

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

26 Scopus citations

Abstract

In-situ refractory metal intermetallic composites(RMICs) based either on (Nb, Si) or (Mo, Si, B) are candidate materials for ultra-high temperature applications (>1 400 °C). To provide a balance of mechanical and environmental properties, Nb-Si composites are typically alloyed with Ti and Cr, and Mo-Si-B composites are alloyed with Ti. Phase diagrams of Nb-Cr-Ti-Si and Mo-Si-B-Ti, as prerequisite knowledge for advanced materials design and processing development, are critically needed. The phase diagrams in the metal-rich regions of multicomponent Nb-Cr-Ti-Si and Mo-Si-B-Ti were rapidly established using the Calphad (Calculation of phase diagram) approach coupled with key experiments. The calculated isotherms, isopleths, and solidification paths were validated by experimental work. The important heterogeneous multiphase equilibria in both quaternary systems identified will offer engineers the opportunity to develop materials with a balance of properties for high-temperature applications.

Original language	English
Pages (from-to)	1396-1404
Number of pages	9
Journal	Transactions of Nonferrous Metals Society of China (English Edition)
Volume	17
Issue number	6
DOIs	https://doi.org/10.1016/S1003-6326(07)60284-2
State	Published - Dec 2007
Externally published	Yes

Funding

The authors would like to thank D J. Dalpe for the directional solidification experiments and Dr. D. A. Wark of R.P.I. for the EMPA measurements for the Nb-Cr-Ti-Si alloys. The authors YANG Ying and Y.A. CHANG would like to thank Doug Berczik and James Myers of Pratt-Whitney for their interest in the work of Mo-Si-B-Ti through the research program of the Revolutionary High Pressure Turbine Blade Material Program of AFRL/ML (Contract No. F33615-98-C-2874). The author YANG Ying would like to thank Dr. Lizhen Tan for the sample fabrication and EBSD measurements of the Mo-Si-B-Ti alloys.

Funders	Funder number
AFRL/ML
Doug Berczik and James Myers of Pratt-Whitney

Keywords

Mo-Si-B-Ti
Nb-Cr-Si-Ti
high temperature structural materials
intermetallics, phase diagram calculation

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10.1016/S1003-6326(07)60284-2

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title = "Application of phase diagram calculations to development of new ultra-high temperature structural materials",

abstract = "In-situ refractory metal intermetallic composites(RMICs) based either on (Nb, Si) or (Mo, Si, B) are candidate materials for ultra-high temperature applications (>1 400 °C). To provide a balance of mechanical and environmental properties, Nb-Si composites are typically alloyed with Ti and Cr, and Mo-Si-B composites are alloyed with Ti. Phase diagrams of Nb-Cr-Ti-Si and Mo-Si-B-Ti, as prerequisite knowledge for advanced materials design and processing development, are critically needed. The phase diagrams in the metal-rich regions of multicomponent Nb-Cr-Ti-Si and Mo-Si-B-Ti were rapidly established using the Calphad (Calculation of phase diagram) approach coupled with key experiments. The calculated isotherms, isopleths, and solidification paths were validated by experimental work. The important heterogeneous multiphase equilibria in both quaternary systems identified will offer engineers the opportunity to develop materials with a balance of properties for high-temperature applications.",

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author = "Ying YANG and Bewlay, {B. P.} and CHEN, {Shuang lin} and Chang, {Y. A.}",

year = "2007",

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doi = "10.1016/S1003-6326(07)60284-2",

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AU - YANG, Ying

AU - Bewlay, B. P.

AU - CHEN, Shuang lin

AU - Chang, Y. A.

PY - 2007/12

Y1 - 2007/12

N2 - In-situ refractory metal intermetallic composites(RMICs) based either on (Nb, Si) or (Mo, Si, B) are candidate materials for ultra-high temperature applications (>1 400 °C). To provide a balance of mechanical and environmental properties, Nb-Si composites are typically alloyed with Ti and Cr, and Mo-Si-B composites are alloyed with Ti. Phase diagrams of Nb-Cr-Ti-Si and Mo-Si-B-Ti, as prerequisite knowledge for advanced materials design and processing development, are critically needed. The phase diagrams in the metal-rich regions of multicomponent Nb-Cr-Ti-Si and Mo-Si-B-Ti were rapidly established using the Calphad (Calculation of phase diagram) approach coupled with key experiments. The calculated isotherms, isopleths, and solidification paths were validated by experimental work. The important heterogeneous multiphase equilibria in both quaternary systems identified will offer engineers the opportunity to develop materials with a balance of properties for high-temperature applications.

AB - In-situ refractory metal intermetallic composites(RMICs) based either on (Nb, Si) or (Mo, Si, B) are candidate materials for ultra-high temperature applications (>1 400 °C). To provide a balance of mechanical and environmental properties, Nb-Si composites are typically alloyed with Ti and Cr, and Mo-Si-B composites are alloyed with Ti. Phase diagrams of Nb-Cr-Ti-Si and Mo-Si-B-Ti, as prerequisite knowledge for advanced materials design and processing development, are critically needed. The phase diagrams in the metal-rich regions of multicomponent Nb-Cr-Ti-Si and Mo-Si-B-Ti were rapidly established using the Calphad (Calculation of phase diagram) approach coupled with key experiments. The calculated isotherms, isopleths, and solidification paths were validated by experimental work. The important heterogeneous multiphase equilibria in both quaternary systems identified will offer engineers the opportunity to develop materials with a balance of properties for high-temperature applications.

KW - Mo-Si-B-Ti

KW - Nb-Cr-Si-Ti

KW - high temperature structural materials

KW - intermetallics, phase diagram calculation

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ER -

Application of phase diagram calculations to development of new ultra-high temperature structural materials

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