Phase equilibria in the Nb-rich Nb-Ti-Si-Cr-Hf alloys

Ying Yang; Bernard P. Bewlay; Austin Chang

doi:10.1557/opl.2011.42

Phase equilibria in the Nb-rich Nb-Ti-Si-Cr-Hf alloys

Ying Yang, Bernard P. Bewlay, Austin Chang

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

Refractory Metal-Intermetallic Composites (RMICs) based on the Nb-Si system have been considered as candidates for the next-generation high temperature materials (i.e. >1200°C). Ti, Cr and Hf have been shown to have beneficial effects on the oxidation resistance and mechanical properties of Nb-Si alloys. The present study has determined phase equilibria in the Nb-rich region of the Nb-Si-Ti-Cr-Hf system via the Calphad approach. The alloying effects of Cr and Hf on the microstructure of Nb-Si-Ti alloys are understood based on isothermal sections, liquidus projections, and solidification curves that were calculated from the thermodynamic models of the Nb-Ti-Si-Cr-Hf system developed in the present study. This work provides important guidelines on the development of new Nb-Si-Ti-Cr-Hf alloys.

Original language	English
Title of host publication	Intermetallic-Based Alloys for Structural and Functional Applications
Pages	385-390
Number of pages	6
DOIs	https://doi.org/10.1557/opl.2011.42
State	Published - 2011
Externally published	Yes
Event	2010 MRS Fall Meeting - Boston, MA, United States Duration: Nov 29 2010 → Dec 3 2010

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1295
ISSN (Print)	0272-9172

Conference

Conference	2010 MRS Fall Meeting
Country/Territory	United States
City	Boston, MA
Period	11/29/10 → 12/3/10

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10.1557/opl.2011.42

Cite this

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title = "Phase equilibria in the Nb-rich Nb-Ti-Si-Cr-Hf alloys",

abstract = "Refractory Metal-Intermetallic Composites (RMICs) based on the Nb-Si system have been considered as candidates for the next-generation high temperature materials (i.e. >1200°C). Ti, Cr and Hf have been shown to have beneficial effects on the oxidation resistance and mechanical properties of Nb-Si alloys. The present study has determined phase equilibria in the Nb-rich region of the Nb-Si-Ti-Cr-Hf system via the Calphad approach. The alloying effects of Cr and Hf on the microstructure of Nb-Si-Ti alloys are understood based on isothermal sections, liquidus projections, and solidification curves that were calculated from the thermodynamic models of the Nb-Ti-Si-Cr-Hf system developed in the present study. This work provides important guidelines on the development of new Nb-Si-Ti-Cr-Hf alloys.",

author = "Ying Yang and Bewlay, \{Bernard P.\} and Austin Chang",

year = "2011",

doi = "10.1557/opl.2011.42",

language = "English",

isbn = "9781605112725",

series = "Materials Research Society Symposium Proceedings",

pages = "385--390",

booktitle = "Intermetallic-Based Alloys for Structural and Functional Applications",

note = "2010 MRS Fall Meeting ; Conference date: 29-11-2010 Through 03-12-2010",

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TY - GEN

T1 - Phase equilibria in the Nb-rich Nb-Ti-Si-Cr-Hf alloys

AU - Yang, Ying

AU - Bewlay, Bernard P.

AU - Chang, Austin

PY - 2011

Y1 - 2011

N2 - Refractory Metal-Intermetallic Composites (RMICs) based on the Nb-Si system have been considered as candidates for the next-generation high temperature materials (i.e. >1200°C). Ti, Cr and Hf have been shown to have beneficial effects on the oxidation resistance and mechanical properties of Nb-Si alloys. The present study has determined phase equilibria in the Nb-rich region of the Nb-Si-Ti-Cr-Hf system via the Calphad approach. The alloying effects of Cr and Hf on the microstructure of Nb-Si-Ti alloys are understood based on isothermal sections, liquidus projections, and solidification curves that were calculated from the thermodynamic models of the Nb-Ti-Si-Cr-Hf system developed in the present study. This work provides important guidelines on the development of new Nb-Si-Ti-Cr-Hf alloys.

AB - Refractory Metal-Intermetallic Composites (RMICs) based on the Nb-Si system have been considered as candidates for the next-generation high temperature materials (i.e. >1200°C). Ti, Cr and Hf have been shown to have beneficial effects on the oxidation resistance and mechanical properties of Nb-Si alloys. The present study has determined phase equilibria in the Nb-rich region of the Nb-Si-Ti-Cr-Hf system via the Calphad approach. The alloying effects of Cr and Hf on the microstructure of Nb-Si-Ti alloys are understood based on isothermal sections, liquidus projections, and solidification curves that were calculated from the thermodynamic models of the Nb-Ti-Si-Cr-Hf system developed in the present study. This work provides important guidelines on the development of new Nb-Si-Ti-Cr-Hf alloys.

UR - https://www.scopus.com/pages/publications/80053181707

U2 - 10.1557/opl.2011.42

DO - 10.1557/opl.2011.42

M3 - Conference contribution

AN - SCOPUS:80053181707

SN - 9781605112725

T3 - Materials Research Society Symposium Proceedings

SP - 385

EP - 390

BT - Intermetallic-Based Alloys for Structural and Functional Applications

T2 - 2010 MRS Fall Meeting

Y2 - 29 November 2010 through 3 December 2010

ER -

Phase equilibria in the Nb-rich Nb-Ti-Si-Cr-Hf alloys

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