Search Results - "Dunlap, R. A."

Synthesis and Electrochemistry of O3-type NaFeO2–NaCo0.5Ni0.5O2 Solid Solutions for Na-Ion Positive Electrodes by Thorne, J. S, Zheng, Lituo, Lee, Christopher L. D, Dunlap, R. A, Obrovac, M. N

“…The synthesis, structure, and electrochemistry in Na cells of NaFe x M1–x O2 positive electrode materials with M = Ni, Co0.5Ni0.5, and Co are reported. In…”
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A comparison of sputtered and mechanically milled Cu6Sn5 + C materials for Li-ion battery negative electrodes by Thorne, J.S., Dahn, J.R., Obrovac, M.N., Dunlap, R.A.

“…Sn27Cu33C40 produced by mechanical milling is compared with Sn27Cu31C42 and Sn26Cu31C43 produced by magnetron sputtering for use as anode materials in Li-ion…”
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Mössbauer effect studies of sputter-deposited tin–cobalt and tin–cobalt–carbon alloys by Todd, A.D.W., Dunlap, R.A., Dahn, J.R.

“…Sn–Co–C alloys are now used as negative electrodes in the latest generation of Li-ion batteries, although not much is known about the phases present in the…”
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A Mössbauer effect study of structural ordering in rapidly quenched Fe–Ga alloys by Dunlap, R.A., McGraw, J.D., Farrell, S.P.

“…Samples of Fe 100− x Ga x ( x=8.3, 17.9, 20.5 and 23.3) were prepared by rapid solidification from the melt using a single Cu roller. X-ray diffraction studies…”
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Mössbauer effect studies of Fe-C combinatorially sputtered thin films by Al-Maghrabi, M.A., Sanderson, R.J., Dunlap, R.A.

“…Alloys of Fe 1− x C x were produced using combinatorial sputtering methods. The composition of the films as a function of position was determined using…”
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Properties of Fe–Ga based powders prepared by mechanical alloying by Gaudet, J.M., Hatchard, T.D., Farrell, S.P., Dunlap, R.A.

“…Alloys of Fe–Ga with starting compositions of 17, 19, 21, 23, and 25 at% Ga and Fe 81Ga 17Z 2 (Z=Si, Sn) have been prepared by mechanical alloying. Samples…”
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Si(CO) y Negative Electrodes for Li-Ion Batteries by Cao, Yidan, Hans, Sophie, Liese, Julia, Werner-Zwanziger, Ulrike, Wang, Jun, Bennett, J. Craig, Dunlap, R. A, Obrovac, M. N

“…Si­(CO) y (0 ≤ y ≤ 0.43) alloys were synthesized by reactive gas milling silicon in CO2 at room temperature. Silicon reacts with CO2 rapidly during milling,…”
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Effect of annealing on nanostructured Sn30Co30C40 prepared by mechanical attrition by THORNE, J. S, FERGUSON, P. P, DUNLAP, R. A, DAHN, J. R

“…Sn30Co30C40 prepared by mechanical attriting is nanostructured with grains of amorphous CoSn dispersed in a disordered carbon matrix. The effects of annealing…”
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Quenched disorder and the critical behavior of a partially frustrated system by Perumal, A, Srinivas, V, Rao, V V, Dunlap, R A

“…We report the direct observation of the effects of quenched disorder on the critical behavior of partially frustrated amorphous FeMnZr alloys by the systematic…”
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A Mössbauer effect and X-ray diffraction study of Fe–Ga–Al thin films prepared by combinatorial sputtering by Dunlap, R.A., Gaudet, J.M., Hatchard, T.D.

“…A combinatorial thin film library of the composition Fe 100− y Ga y − x Al x was prepared by magnetron sputtering. The composition was determined by electron…”
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Observation of a composition-controlled high-moment/low-moment transition in the face centered cubic Fe–Ni system: Invar effect is an expansion, not a contraction by Lagarec, K, Rancourt, D.G, Bose, S.K, Sanyal, B, Dunlap, R.A

“…We report the first conclusive observation of a high-moment (HM)/low-moment (LM) transition occurring in face centered cubic Fe–Ni alloys. 57Fe Mössbauer…”
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Combinatorial material science studies of Fe-rich Fe–Al and Fe–Si thin films by Dunlap, R.A., Sibley, G.L., Sy, F.N., Hatchard, T.D.

“…Combinatorially sputtered libraries of Fe-rich thin films of the compositions Fe 100− x Al x (with 2.9 < x < 30.9) and Fe 100− x Si x (with 2.0 < x < 22.8)…”
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Investigation of the reversible sodiation of Sn foil by ex-situ X-ray diffractometry and Mössbauer effect spectroscopy by Du, Zhijia, Dunlap, R.A., Obrovac, M.N.

“…•Mössbauer spectra of all phases formed during sodiation measured for the first time.•Center shifts correlated with metallurgically prepared samples.•Center…”
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Role of CuO in improving NH3 and SO2 capture on nanoporous Fe2O3 sorbents by Ma, Xiaowei, Zhao, Xiuyun, Liu, Aaron, Rankin, Matthew A., Croll, Lisa M., Dunlap, R.A., Dahn, J.R.

“…[Display omitted] In this work, mixed Fe/Cu oxides as sorbents for SO2 and NH3 removal were investigated. Nanoporous iron oxide mixed with 10, 20 and 30 at.%…”
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(Cu6Sn5)1−xCx active/inactive nanocomposite negative electrodes for Na-ion batteries by Thorne, J.S., Dunlap, R.A., Obrovac, M.N.

“…The electrochemistry of Sn–Cu–C nanocomposite anode materials in Na-ion cells is described and compared directly to similar compositions from previous work in…”
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Synthesis and Electrochemistry of O3-type NaFeO 2 -NaCo 0.5 Ni 0.5 O 2 Solid Solutions for Na-Ion Positive Electrodes by Thorne, J S, Zheng, Lituo, Lee, Christopher L D, Dunlap, R A, Obrovac, M N

“…The synthesis, structure, and electrochemistry in Na cells of NaFe M O positive electrode materials with M = Ni, Co Ni , and Co are reported. In particular,…”
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An investigation of mechanically alloyed Fe–Al by Eelman, D.A, Dahn, J.R, MacKay, G.R, Dunlap, R.A

“…An X-ray diffraction and 57 Fe Mössbauer effect spectra study of mechanically alloyed Fe 100− x Al x is presented. Alloys with 0≤ x≤60 were prepared from…”
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A Mössbauer effect and X-ray diffraction investigation of Ti–Sn intermetallic compounds: I. Equilibrium phases by O’Brien, J.W, Dunlap, R.A, Dahn, J.R

“…A thorough X-ray diffraction and Mössbauer effect investigation of Ti 3Sn, Ti 2Sn, Ti 5Sn 3, Ti 6Sn 5, and Ti 2Sn 3 phases in the Ti–Sn binary system has been…”
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Mössbauer effect and X-ray diffraction investigation of Si-Fe thin films by McGraw, J. D., Fleischauer, M. D., Dahn, J. R., Dunlap, R. A.

“…An X-ray diffraction and 57 Fe Mössbauer spectroscopy investigation of Si 100- x Fe x (0 < x < 80) thin films prepared by combinatorial sputtering methods is…”
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A Mössbauer effect investigation of superparamagnetic behavior in ball milled Mn–Zn ferrites by Dunlap, R.A, Alghamdi, A, O’Brien, J.W, Penney, S.J

“…Nanostructured Mn 1− x Zn x Fe 2O 4, with x=0.4, 0.5, 0.6 and 0.7, were prepared by ball milling and were investigated using X-ray diffraction and 57Fe…”
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