Zobrazeno 1 - 10
of 80
pro vyhledávání: '"I Orgzall"'
Autor:
S. Tkachev, B. K. Godwal, A. Eifler, S. Meenakshi, V. Vijyakumar, I. Orgzall, Hans D. Hochheimer
Publikováno v:
Journal of Physics and Chemistry of Solids. 67:1660-1667
We report the results of an X-ray diffraction study of CdAl 2 Se 4 and of Raman studies of HgAl 2 Se 4 and ZnAl 2 Se 4 at room temperature, and of CdAl 2 S 4 and CdAl 2 Se 4 at 80 K at high pressure. The ambient pressure phase of CdAl 2 Se 4 is stabl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7047265993210953b7a5ce850f933751
https://doi.org/10.1016/j.jpcs.2006.02.015
https://doi.org/10.1016/j.jpcs.2006.02.015
Autor:
H. Lorenz, I. Orgzall
Publikováno v:
Scripta Materialia. 52:537-540
The formation processes of cubic boron nitride (cBN) from disordered turbostratic BN are observed in situ under high pressures and temperatures. It is found that cBN grows directly from an amorphous matrix and not from different BN polymorphs as prev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0531898545933675b7d381c66d002167
https://doi.org/10.1016/j.scriptamat.2004.10.016
https://doi.org/10.1016/j.scriptamat.2004.10.016
Autor:
I. Orgzall, H. Lorenz
Publikováno v:
Acta Materialia. 52:1909-1916
The high pressure–high temperature phase transition behavior of boron nitride powders is investigated. These starting materials differ in their initial crystallinity ranging from highly crystalline to amorphous powders. A convenient way to produce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2d7543c3b646e92aac7207aa906b4be
https://doi.org/10.1016/j.actamat.2003.12.030
https://doi.org/10.1016/j.actamat.2003.12.030
Publikováno v:
Applied Physics A: Materials Science & Processing. 65:487-495
N2BN system are presented and discussed. In particular, a temperature region slightly above the lower limit of the formation region characterized by fast transformation processes and submicron cBN grains strongly agglomerated is investigated in more
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::183a1d74258b8feff1fdc58abb5f7e5d
https://doi.org/10.1007/s003390050613
https://doi.org/10.1007/s003390050613
Autor:
I. Orgzall, H. Lorenz
Publikováno v:
Diamond and Related Materials. 4:1046-1049
New experimental results for cubic boron nitride (cBN) formation in the system Mg 3 N 2 -BN are presented and discussed. Generally, two different regions may be distinguished. At high pressures and temperatures precipitation processes from a melt via
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c2c06702f8c4e84cab109d259017c8f
https://doi.org/10.1016/0925-9635(95)00275-8
https://doi.org/10.1016/0925-9635(95)00275-8
Publikováno v:
Diamond and Related Materials. 4:1050-1055
The catalytic transformation from hBN to cBN in the system Mg 3 N 2 -BN was investigated in more detail under high pressures and temperature using in-situ sensing methods. At the threshold of the cBN formation region (approximately 1550 K at 5.5 GPa)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7e3dc4df19f99586554dc5b45d4f16e
https://doi.org/10.1016/0925-9635(95)00276-6
https://doi.org/10.1016/0925-9635(95)00276-6
Autor:
I. Orgzall, Bernd Lorenz
Publikováno v:
Philosophical Magazine B. 71:407-412
The cluster structures arising in continuum models of percolation are investigated with respect to the cluster anisotropy as function of the degree of space filling. It is shown that the smaller and intermediate sized clusters are anisotropic up to h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df93b48f9ec4b6918144a5b2c15b0a17
https://doi.org/10.1080/13642819508239043
https://doi.org/10.1080/13642819508239043
Publikováno v:
Journal of Physics A: Mathematical and General. 26:4711-4722
The percolation thresholds and the fractal cluster structures for continuum models of percolation with uniform (CM1) and variable radius (CM2) distributions of discs and spheres are investigated and compared with the results of ordinary lattice perco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cee3bbd74913ec6f5760be6c096e4115
https://doi.org/10.1088/0305-4470/26/18/032
https://doi.org/10.1088/0305-4470/26/18/032
Publikováno v:
Scripta Metallurgica et Materialia. 28:925-930
Magnesium boron nitride is a well known and often applied catalyst for the transformation from hexagonal boron nitride (hBN) to its cubic polymorph cBN. Recently published results of structural investigations contributed to a better understanding of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3aa3325f47017ad7dd6fd32fa6e8f1a
https://doi.org/10.1016/0956-716x(93)90057-y
https://doi.org/10.1016/0956-716x(93)90057-y
Publikováno v:
Scripta Metallurgica et Materialia. 27:993-997
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2a183c495350a9bfe140c5a90668f07
https://doi.org/10.1016/0956-716x(92)90462-n
https://doi.org/10.1016/0956-716x(92)90462-n