A Computational Tool for the Prediction of Long Term Stability of Refractory Alloys

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNC06CA76C
Agency Tracking Number: 053288
Amount: $69,955.00
Phase: Phase I
Program: SBIR
Awards Year: 2006
Solitcitation Year: 2005
Solitcitation Topic Code: X10.05
Solitcitation Number: N/A
Small Business Information
CompuTherm, LLC
437 S. Yellowstone Dr., Suite 217, Madison, WI, 53719-2902
Duns: 939950622
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: Y
Principal Investigator
 Fan Zhang
 Principal Investigator
 (608) 274-1414
 fan@chorus.net
Business Contact
 Y. Austin Chang
Title: President
Phone: (608) 274-1414
Email: chang@chorus.net
Research Institution
N/A
Abstract
NASA's missions of space exploration require significant power sources both for propulsion and for on-board power. This motivates the development of high temperature structural materials to maximize the thermodynamic efficiency of power conversion systems. Refractory alloys are essential due to their high operating temperature capability that in turn enables high thermal conversion efficiency. The overall objective of the proposed study is to provide NASA with a simulation tool that can be used to improve the performance of current available refractory alloys and accelerate the development of new refractory alloys with desired properties for space nuclear applications. The tool will include: (1) A thermodynamic database for the multi-component RM-TM-IE system, in which RM represents refractory metals including Nb, Mo, Ta, W, and Re; TM represents transition metals including Ti, Zr, and Hf; and IE represents interstitial elements, such as C, N, and O. (2) A mobility database for the multi-component RM-TM-IE system; (3) A computer software package with needed functions for thermodynamic calculations, kinetic simulations, and user-friendly interface. In Phase I, the tool will be developed for the Nb-Zr-C sub-system to examine the feasibility. In Phase II, its applications will be extended to multi-component RM-TM-IE refractory alloy systems.

* information listed above is at the time of submission.

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