Zobrazeno 1 - 10
of 63
pro vyhledávání: '"O. Jaoul"'
Autor:
O. Jaoul, Alexandre Dimanov
Publikováno v:
Physics and Chemistry of Minerals. 26:116-127
We have investigated 44Ca self-diffusion in natural diopside single crystals (containing ∼2 atomic % Fe) at temperatures up to 1320 °C (i.e. 30 °C below the nominal melting point). Oxygen fugacity was controlled by gaseous mixtures. Diffusion pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c77723af53abb378acdfd1166fd81c3
https://doi.org/10.1007/s002690050168
https://doi.org/10.1007/s002690050168
Publikováno v:
Physics and Chemistry of Minerals. 25:485-493
San Carlos olivine samples enclosed in soft iron capsules were annealed in an uniaxial split-sphere apparatus, at pressures ranging from 4.6 to 9.0 GPa and temperature ranging from 1310o to 1595 oC. We estimated the annealing fO2, theoretically contr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fb4c22987cc64b7e48efa04f58b7724
https://doi.org/10.1007/s002690050139
https://doi.org/10.1007/s002690050139
Publikováno v:
Geophysical Research Letters. 24:2597-2600
The activation volume of silicon diffusion (Vsi) in olivine is reported for the first time. Specimens of San Carlos olivine single crystal were annealed at 1763 K and at pressures to 9 GPa in an uniaxial split-sphere apparatus. 30Si was used as trace
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d37fff2971562d3c0c639eada14623d
https://doi.org/10.1029/97gl02735
https://doi.org/10.1029/97gl02735
Publikováno v:
Physics and Chemistry of Minerals. 5:15-19
A method for decorating dislocations in forsterite (Mg2SiO4) is presented. It gives a complete description of the dislocation structures in this silicate and thus improves our understanding of its plastic properties. It consists of diffusing ferrous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fa068f1b253986d1b6cdf4d6108c91e
https://doi.org/10.1007/bf00308165
https://doi.org/10.1007/bf00308165
Publikováno v:
Earth and Planetary Science Letters. 47:391-397
The diffusivity of18O in forsterite Mg2SiO4 has been measured in the temperature range 1150–1600°C. The activation energy of oxygen self-diffusion in this silicate is found to equal0.32 ± 0.04MJ/mol(77 ± 10kcal/mol), and there is no dependence o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd0531c6e34aa62c0b2051ef152095fd
https://doi.org/10.1016/0012-821x(80)90026-6
https://doi.org/10.1016/0012-821x(80)90026-6
Publikováno v:
Philosophical Magazine A. 52:5-17
Les proprietes plastiques de la silice vitreuse, SiO2, sont etudiees par des experiences de fluage en compression au voisinage de la transition vitreuse, T g ≃ 1200°C, a des temperatures entre 1000°C et 1400°C. Les deux observations suivantes do
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b28331f4dd18becd594a8940c31b9ef0
https://doi.org/10.1080/01418618508237601
https://doi.org/10.1080/01418618508237601
Publikováno v:
Journal of Magnetism and Magnetic Materials. 5:23-34
We present experimental results for the resistivity anisotropy of Ni alloys containing transition impurities. From these results and those of other authors, we show that the Smit spin mixing mechanism is dominant in all cases where there is no d virt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5f22504260c7c6eaa4f6bf5c9c79e44
https://doi.org/10.1016/0304-8853(77)90193-7
https://doi.org/10.1016/0304-8853(77)90193-7
Autor:
I A Campbell, O Jaoul
Publikováno v:
Journal of Physics F: Metal Physics. 5:L69-L73
Measurements of the transport properties of ni-based alloys show deviations from the expectations of a two current conduction model when the impurity concentration is low. The deviations can be accounted for by introducing a zero temperature spin-mix
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3811914296eeefead2fd2401992b7d9
https://doi.org/10.1088/0305-4608/5/5/033
https://doi.org/10.1088/0305-4608/5/5/033
Publikováno v:
Physics of the Earth and Planetary Interiors. 19:263-274
Thirty-one single crystals of synthetic forsterite, Fo 100 , were deformed in 69 compressional creep tests in a 0.1-MPa confining atmosphere of H 2 + Ar. Temperature ranged from 1753 to 2023 K and stress σ (= σ 1 - σ 3 ) from 1.5 to 37.8 MPa. Stea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::538307ef353948e067590f414689a1aa
https://doi.org/10.1016/0031-9201(79)90027-x
https://doi.org/10.1016/0031-9201(79)90027-x
Publikováno v:
Nuclear Instruments and Methods in Physics Research. 191:357-366
The difficulties of depth profiling in single crystals, using MeV light ion beams, are discussed with particular emphasis on planar channeling effects. Depth profiling of 18 O self-diffused crystals (corundum, Al 2 O 3 ; forsterite, Mg 2 SiO 4 ) via
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b264ed6d7de1d5d734d2110038bdbdc
https://doi.org/10.1016/0029-554x(81)91029-6
https://doi.org/10.1016/0029-554x(81)91029-6