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  • 1
    Electronic Resource
    Electronic Resource
    Adhesion of liquid nickel to materials of the Si3N4-ZrO2 and Si3N4-Cr2O3 systems (1977)
    Springer
    Powder metallurgy and metal ceramics 16 (1977), S. 392-394 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions Refractory silicon nitride materials containing up to 50 wt.% of chromic and zirconium oxides (stabilized with CaO) are suitable for applications involving contact with liquid nickel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00791095
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Production and properties of Si3N4-Cr2O3 materials (1972)
    Springer
    Powder metallurgy and metal ceramics 11 (1972), S. 546-549 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. A study was made of the properties of Si3N4-Cr2O3 materials produced by hot casting. The optimum binder content of equal-viscosity slips of this system proved to be 30–40 vol.% rising with increase in chromic oxide concentration. 2. In oxidation resistance tests, the materials exhibited negligible weight gains (6.1–17.1 mg/cm2). 3. In thermal fatigue resistance determinations, the number of 1300-20°C (water) thermal cycles withstood by the materials was as high as 30, and varied with silicon nitride concentration. 4. The impact strength of Si3N4-Cr2O3 materials falls with increase in porosity, but for some compositions exceeds 6 kg-m/cm2. 5. A comparative study was made of Si3N4-Cr2O3 materials and silicon nitride materials containing other oxides. It is shown that materials based on silicon nitride and chromic oxide successfully combine the best properties of their components. The best properties are exhibited by silicon nitride with 15–25 wt.% chromic oxide additions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00798192
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Some properties of materials of the system Si3N4-ZrO2 (1974)
    Springer
    Powder metallurgy and metal ceramics 13 (1974), S. 512-514 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. A study was made of some properties of materials of the system silicon nitride-zirconium dioxide (stabilized with CaO). Specimens for investigation were prepared by the method of hot casting. The amount of binder required was found to be a linear function of the composition of the materials. 2. At a porosity of 20–26%, silicon nitride-zirconium dioxide materials possess good oxidation and thermal fatigue resistance. The latter is linked with their low coefficient of thermal expansion (3.2–7.2). 3. The impact strength of the materials attains a value of 8.2 kg·cm/cm2 and is thus much higher than that of technical ceramics. 4. The compressive strength of the materials grows with rise in ZrO2 content, but the resultant improved strength sharply falls after only five thermal cycles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00791981
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Production and properties of spheroidized refractory compound powders for plasma spraying (1975)
    Springer
    Powder metallurgy and metal ceramics 14 (1975), S. 173-176 
    Details
    ISSN: 1573-9066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. A process has been developed for the production of spheroidized powders of refractory compounds suitable for plasma spraying. Tests were carried out on such powders. 2. The process makes it possible to produce, with a high yield of good-quality material, spheroidized powders of fine, narrow fractions (e.g., 50–70 or 70–100μ), which give good results in plasma spraying. 3. Spheroidized powders produced with the plasticizers chosen in this work do not disintegrate during prolonged storage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00801715
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    Paper (German National Licenses)
    Fulltext
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