Výsledky vyhledávání - "O. J. Kleppa"

Standard enthalpies of formation of some 5d transition metal gallides by high-temperature direct synthesis calorimetry

Autor: O. J. Kleppa, S.V. Meschel

Publikováno v: Journal of Alloys and Compounds. 311:241-247

The standard enthalpies of formation of some 5d transition metal gallides have been measured by high-temperature direct synthesis calorimetry at 1373±2 K. The following results (in kJ/mol of atoms) are reported: LaGa 2 (−69.2±2.4); HfGa 3 (−42.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f5befe50e105cdec7609f5c55822ba12
https://doi.org/10.1016/s0925-8388(00)01113-0

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Enthalpies of liquid–liquid mixing in the systems Cu–Ag, Cu–Au and Ag–Au by using an in-situ mixing device in a high temperature single-unit differential calorimeter

Autor: K. Fitzner, O. J. Kleppa, Qiti Guo, Junwen Wang

Publikováno v: Journal of Alloys and Compounds. 291:190-200

The enthalpies of mixing of the binary liquid alloys of copper with silver, copper with gold and silver with gold have been re-determined using a new in-situ mixing technique at 1375±2 K. In this paper we report the following analytical expressions

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ff90802b276d14895fe93c5ecd27ea46
https://doi.org/10.1016/s0925-8388(99)00279-0

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Standard enthalpies of formation of some thulium alloys by high temperature direct synthesis calorimetry

Autor: S.V. Meschel, O. J. Kleppa

Publikováno v: Journal of Alloys and Compounds. 285:179-184

The standard enthalpies of formation of some Thulium alloys in the binary systems of Tm–X (where X=C, Si, Ge, Sn, B, Ga) have been determined by high temperature direct synthesis calorimetry at 1373±2 K. The following values of ΔHfo in kJ/mol of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c6d7cd8282bd6c2e695861b36062816a
https://doi.org/10.1016/s0925-8388(99)00017-1

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Standard enthalpies of formation of some alloys formed between Group IV elements and Group VIII elements, determined by high-temperature direct synthesis calorimetry

Autor: Qiti Guo, O. J. Kleppa

Publikováno v: Journal of Alloys and Compounds. 266:224-229

The standard enthalpies of formation of thirteen alloys formed between Group IV elements (Ti, Zr, Hf) and Group VIII elements (Co, Ni) in the periodic table have been determined by high-temperature direct synthesis calorimetry at 1477±2 K or at 1374

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79a40e2749479b8243d8b8fb5c065763
https://doi.org/10.1016/s0925-8388(97)00484-2

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Determination of the standard enthalpies of formation of Pd2Ga and PdGa by high-temperature direct synthesis calorimetry

Autor: O. J. Kleppa, S.V. Meschel

Publikováno v: Thermochimica Acta. 292:13-17

The standard enthalpies of formation of PdGa and Pd 2 Ga have been determined by high-temperature direct synthesis calorimetry at (1473 ± 2) K. The following values of Δ f H 0 in kJ (mol of atoms) −1 are reported: PdGa (−71.6 ± 2.3); Pd 2 Ga (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::551c6ce01eede74f23571cf51cd72cc9
https://doi.org/10.1016/s0040-6031(97)00019-1

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Thermochemistry of binary alloys of transition metals: The systems Me-Gd, Me-Ho, and Me-Lu (Me = Cu, Ag, and Au)

Autor: K. Fitzner, O. J. Kleppa

Publikováno v: Metallurgical and Materials Transactions A. 28:187-190

The standard enthalpies of formation of 18 congruently melting, intermetallic compounds in the (Gd, Ho, Lu)-(Cu, Ag, Au) binary systems have been determined by high-temperature direct synthesis calorimetry at 1473±2 K. The liquid-liquid enthalpies o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::870ddee313a676d93ad8169c2acf1e23
https://doi.org/10.1007/s11661-997-0094-6

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Standard Enthalpies of Formation of Some Erbium Alloys, Er + Me (M = Ni, Ru, Rh, Pd, Ir, Pt), by High Temperature Direct Synthesis Calorimetry

Autor: Oiti Guo, O. J. Kleppa

Publikováno v: International Journal of Materials Research. 87:796-801

The standard enthalpies of formation of thirteen erbium alloys with late transition metals have been determined by direct synthesis calorimetry at 1473 ± K. The following values of ΔH f 0 (kJ (mole atom) -1 ) are reported : ErNi, -(42. 1 ± 1.8) ;

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3ed1a373479e2c9e0c1b59e20f74c26a
https://doi.org/10.1515/ijmr-1996-871010

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Standard enthalpies of formation of dysprosium alloys, Dy + Me (Me = Ni, Ru, Rh, Pd, lr, and Pt), by high-temperature direct synthesis calorimetry

Autor: O. J. Kleppa, Qiti Guo

Publikováno v: Metallurgical and Materials Transactions B. 27:417-422

The standard enthalpies of formation of 13 dysprosium alloys with late transition metals have been determined by direct synthesis calorimetry at 1474 ± 2 K. The following values of Δ f o (kJ (mole atom)−1) are reported: DyNi, -(35.2 ± 1.5); DyNi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::63857247ad3dcdbcf10b836e6605016f
https://doi.org/10.1007/bf02914906

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