Das Verhalten metallreicher, hochschmelzender Silizide gegen�ber Bor, Kohlenstoff, Stickstoff und Sauerstoff

Nowotny, H.; Lux, B.; Kudielka, Heinz

doi:10.1007/bf00902640

Cited by 74 publications

(34 citation statements)

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“…Brewer and Krikorian [17] were the first to calculate a partial, tentative isothermal section at about 2000 K for the concentration range ZrC-C-Si-SiZr 2 in 1956. Later Nowotny et al [18] reported a partial isothermal section of Si and Zr rich side at 1873 K. The existence of ternary compound (Zr 5 Si 3 ) with D8 8 structure was confirmed and indicated later as Zr 5 Si 3 C x . The phase field for Zr 5 Si 3 C x was extended from 0.2 to about 4 at.% C by Nowotny et al [18].…”

Section: The C-si-zr Ternary Systemmentioning

confidence: 84%

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Thermodynamic assessment of the C–Si–Zr system

Chen

Xiang

Wang

et al. 2009

Journal of Alloys and Compounds

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Section: The C-si-zr Ternary Systemmentioning

confidence: 84%

“…Later Nowotny et al [18] reported a partial isothermal section of Si and Zr rich side at 1873 K. The existence of ternary compound (Zr 5 Si 3 ) with D8 8 structure was confirmed and indicated later as Zr 5 Si 3 C x . The phase field for Zr 5 Si 3 C x was extended from 0.2 to about 4 at.% C by Nowotny et al [18].…”

Section: The C-si-zr Ternary Systemmentioning

confidence: 84%

Thermodynamic assessment of the C–Si–Zr system

Chen

Xiang

Wang

et al. 2009

Journal of Alloys and Compounds

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“…Nowotny et al [3] investigated the stabilization of the D8 8 phase (Mn 5 Si 3 prototype) in the V-Si-B system phase by B doping the V 5 Si 3 (T 1 , W 5 Si 3 prototype) phase. The authors produced alloys with composition V 5 Si 3 + 5% at.…”

Section: Introductionmentioning

confidence: 99%

“…In Fig. 1, the phase identified as D8 8 presents a chemical composition near V 59.3 Si 34.8 B 5.9 (at.%) and the alloys studied by the authors are marked with an ''x'' letter, with B and Si contents varying in the proportion 3:1, 1:1, and 1:3 along the V 5 Si 3 -V (5) B (3) line.…”

Section: Introductionmentioning

confidence: 99%

Isothermal Section of the V-Si-B System at 1600 °C in the V-VSi2-VB Region

Nunes

Lima

Coelho

et al. 2009

J. Phase Equilib. Diffus.

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In recent years, the Me-Si-B (Me-metal) ternary systems have received considerable attention aiming at the development of high-temperature structural materials. Assuming that any real application of these materials will rely on multicomponent alloys, as is the case of Ni-base superalloys, phase equilibria data of these systems become very important. In this work, results are reported on phase equilibria in the V-Si-B system, and are summarized in the form of an isothermal section at 1600°C for the V-VSi 2 -VB region. Several alloys of different compositions were prepared via arc melting and then heat-treated at 1600°C under high vacuum. All the materials in both as-cast and heat-treated conditions were characterized through x-ray diffraction, scanning electron microscopy, and selected alloys via wavelength dispersive spectroscopy. A negligible solubility of B in the V 3 Si, V 5 Si 3 (T 1 ), and V 6 Si 5 phases as well as of Si in V 3 B 2 and VB phases was noted. Two ternary phases presenting the structures known as T 2 (Cr 5 B 3 -prototype) and D8 8 (Mn 5 Si 3 -prototype) were observed in both as-cast and heat-treated samples. It is proposed that at 1600°C the homogeneity range of T 2 extends approximately from 5 at.% to 12 at.% Si at constant vanadium content and the composition of D8 8 phase is close to V 59.5 Si 33 B 7.5 (at.%).

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“…Furthermore, several Nowotny phases of D8 8 type structure were stabilized by the presence of small amounts of carbon, boron, oxygen, or nitrogen. [17][18][19] While the former mentioned phases were synthesized under ambient pressure conditions, the germanide oxide Ce 4 Ag 3 Ge 4 O 0.5 was synthesized under high-pressure/high-temperature conditions, starting from NdPtSb type CeAgGe [20][21][22] as a precursor compound. Since elemental silver has been detected in the X-ray powder diagram of the reaction product, the following reaction scheme under the conditions of 11.5 GPa and 1300°C can be formulated: The amount of oxygen needed derives from diffusion, leaking out of the experimental surroundings (oxygen containing ceramics) at temperatures exceeding 1200°C and from surface oxidation of the milled precursor.…”

Section: Introductionmentioning

confidence: 99%