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Autor:
V. Ponnambalam, Donald T. Morelli
Publikováno v:
Journal of Alloys and Compounds. 740:42-46
Sn substituted Ge1-xSnx type phases can have a variety of optoelectronic and energy applications as the band gap in these materials is tunable by varying x. Super saturated solid solutions Ge1-xSnx (x ≤ 5.0%) have been synthesized by ball milling t
Autor:
V. Ponnambalam, Donald T. Morelli
Publikováno v:
Journal of Electronic Materials. 44:2089-2094
Composites of nominal composition (Pb0.98Na0.02Te)1−y(CoSe2)y and (Pb0.95Na0.05Te)1−y(CoSe2)y with y = 0.05–0.15 have been synthesized to study their thermoelectric properties. In these composites CoTe2 is the secondary phase. The room temperat
Publikováno v:
Journal of Alloys and Compounds. 580:598-603
Defect manganese silicides have been substituted with Cr and Ru, in order to study the role of these substitutions on the resulting resistivity ( ρ ), Seebeck ( α ) and Hall coefficients and thermal conductivity. The resistivity and Seebeck coeffic
Autor:
V. Ponnambalam, Donald T Morelli
Publikováno v:
Materials Research Express. 6:025507
Autor:
Song Zhu, Tim Holgate, Terry M. Tritt, Jian He, Shanyu Wang, Jennifer Graff, S. J. Poon, V. Ponnambalam, Xinfeng Tang, Qingjie Zhang, Wenjie Xie, Xianli Su
Publikováno v:
Acta Materialia. 58:4705-4713
We report an induction-melting spark-plasma-sintering synthesis process of the nanocomposite material composed of (TiZrHf)(CoNi)Sb coarse grains and in situ formed InSb nanoinclusions that occur primarily on the grain boundaries. We were able to qual
Autor:
X. Gao, S. Lindsey, Zhe Su, P. N. Alboni, Bo Zhang, F. Drymiotis, Murray S. Daw, V. Ponnambalam, Terry M. Tritt
Publikováno v:
Journal of Alloys and Compounds. 484:80-85
Zintl phases of type M 16 X 11 (M = Ca and Yb; X = Sb and Bi) have been synthesized by both the flux or solid state reaction methods. In order to evaluate the potential of these phases for thermoelectrics, the electrical resistivity ( ρ ), thermopow
Publikováno v:
Journal of Electronic Materials. 36:732-735
The usefulness of half-Heusler (HH) alloys as thermoelectrics has been mainly limited by their relatively large thermal conductivity, which is a key issue despite their high thermoelectric power factors. In this regard, Bi-containing half-Heusler all
Publikováno v:
Journal of Materials Research. 22:544-550
Four-point-bend fatigue experiments were conducted on the Fe48Cr15Mo14Er2C15B6 bulk metallic glass (BMG), amorphous steel, under load control, employing an electrohydraulic machine, at a frequency of 10 Hz (using a sinusoidal waveform) with an R rati
Publikováno v:
Journal of Materials Research. 19:3046-3052
The glass formability of high-manganese amorphous steel alloys reported earlier by us has been found to improve upon additions of yttrium and lanthanide elements, enabling the formation of bulk glassy samples with diameter thicknesses reaching 7 mm b