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Half-Heusler Alloys with Enhanced Figure of Merit and Methods of Making

United States Patent Application

20120326097
A1
View the Complete Application at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
Thermoelectric materials and methods of making thermoelectric materials having a nanometer mean grain size less than 1 micron. The method includes combining and arc melting constituent elements of the thermoelectric material to form a liquid alloy of the thermoelectric material and casting the liquid alloy of the thermoelectric material to form a solid casting of the thermoelectric material. The method also includes ball milling the solid casting of the thermoelectric material into nanometer mean size particles and sintering the nanometer size particles to form the thermoelectric material having nanometer scale mean grain size.
Ren, Zhifeng (Newton, MA), Yan, Xiao (Chesnut Hill, MA), Joshi, Giri (Brighton, MA), Chen, Gang (Carlisle, MA), Poudel, Bed (Brighton, MA), Caylor, James Christopher (Melrose, MA)
Trustees of Boston College (Chesnut Hill MA), GMZ Energy, Inc. (Waltham MA)
13/ 330,216
December 19, 2011
[0002] This invention was made with government support under grant number DOE DE-FG02-00ER45805 (Z.F.R.) awarded by US Department of Energy. The government has certain rights in the invention.