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[en] Metal-oxide mixtures form eutectic structures when melted with group Va and VIa metals. With the appropriate composition of the oxide mixture, the metal occurs as ordered fibers embedded in the oxide matrix. The eutectics in these systems are of the faceted-nonfaceted type in which the oxide matrix exhibits faceted and the metallic phase nonfaceted growth. From metallographic and SEM studies conclusions concerning the growth mechanisms in these systems can be drawn. With help of metallographic and SEM investigations a model of formation of eutectic structures in a binary system is discussed. (orig.)
[de]
Keramik-Metall-Eutektika, bei denen die metallische Phase in Form geordneter Fasern in die Oxidmatrix eingebettet ist, entstehen beim Abkuehlen von Mischungen bestimmter Oxide mit Va und VIa Metallen aus der Schmelze, Es handelt sich um facettet-nichtfacettete Eutektika, bei denen die Oxidmatrix facettet und die Metallphase nichtfacettet wachsen. Metallographische- und REM-Untersuchungen lassen Rueckschluesse auf den Bildungsmechanismus derartiger Eutektika zu. Aufgrund der metallographischen- und REM-Befunde wird anhand einer binaeren Darstellung eines Metall-Oxid-Systems eine Modellvorstellung zur Entstehung und Ausbildung der eutektischen Gefuege diskutiert. (orig.)Journal
Metall; ISSN 0026-0746; 
; v. 34(7); p. 633-636
; v. 34(7); p. 633-636
[en] An isothermal section at 1,0000C of the system Sm-C-N was examined by X-ray diffraction techniques. Complete solid solubility between the phases SmCsub(1-x) and SmN could be established. No indication for the existence of a ternary samarium carbonitride phase analogous to La1Csub(0.88)Nsub(0.77) could be found. (auth.)
Journal
Monatshefte fuer Chemie; ISSN 0026-9247; ; v 111(5); p. 1061-1065
; v 111(5); p. 1061-1065
[en] An isothermal section at 12000C of the system Gd-C-N was examined by X-ray techniques. The results give evidence of complete miscibility of the phases GdCsub(x)(x = 0.35-0.65) and GdN. No appreciable miscibility of GdN with Gd2C3 or GdC2 at 12000C could be found. The reaction of nitrogen with GdC2 under pressure of 30 bar at 12000C does not lead to a ternary carbonitride phase as it does in the case of LaC2. (orig.)
Journal
Journal of Nuclear Materials; ISSN 0022-3115; ; v. 91(1); p. 117-120
; v. 91(1); p. 117-120
[en] The miscibility of UC with LaN, CeN, PrN, NdN, SmN, GdN, DyN and ErN has been investigated. X-ray studies of the mixed nitride phases indicate miscibility in all cases with one exception in the system UC-LaN. (orig.)
Journal
Journal of Nuclear Materials; ISSN 0022-3115; ; v. 91(2/3); p. 293-296
; v. 91(2/3); p. 293-296
[en] X-ray studies of the mixed nitride phases indicate complete solid solubility in all cases. (author)
Journal
Monatshefte fuer Chemie; ISSN 0026-9247; ; v. 111(4); p. 945-948
; v. 111(4); p. 945-948
[en] The Mo-W-N system has been investigated by nitriding Mo-W alloys of different compositions at 7000C with flowing ammonia. The nitrided samples were annealed at 11000C under nitrogen at pressures of 30 and 300 bars, then analysed and investigated by x-rays. Up to 32% of molybdenum atoms could be replaced by tungsten atoms at a nitrogen pressure of 300 bars, while at 30 bars there was no appreciable solubility of tungsten in γ-M02N. (author)
Journal
High Temperatures - High Pressures; ISSN 0018-1544; ; v. 11(3); p. 349-352
; v. 11(3); p. 349-352
[en] ThC is completely miscible with LaN, CeN, PrN, NdN, SmN and GdN at 18000C. A miscibility gap is observed in the system ThC-ErN. (auth.)
Journal
Monatshefte fuer Chemie; ISSN 0026-9247; ; v. 111(5); p. 1185-1188
; v. 111(5); p. 1185-1188
[en] 18 contributions on application of natural science methods in tand conservation of cultural objects. One contribution is of INIS interest. (G.Q.)
Source
1986; 390 p; Verlag Orac; Vienna (Austria); ISBN 3-85368-781-4;
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