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  • 1
    facet.materialart.
    Unknown
    In:  Other Sources
    Publication Date: 2019-06-27
    Description: Co-Cr alloy oxidation behavior at high temperatures and various oxygen pressures
    Keywords: MATERIALS, METALLIC
    Type: ; ADEMIE DES SCIENCES
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  • 2
    Publication Date: 2019-06-27
    Description: Vacuum annealing treatments effect on oxidation rate of Co-Cr alloy at high temperatures
    Keywords: MATERIALS, METALLIC
    Type: ; ACE(
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  • 3
    Publication Date: 2019-07-13
    Description: Cobalt chromium alloys high temperature oxidation kinetics, discussing thermographic study of oxidation rate and oxygen pressure role
    Keywords: MATERIALS, METALLIC
    Type: ECS PAPER 413 , ELECTROCHEMICAL SOCIETY, MEETING; Oct 06, 1968 - Oct 11, 1968; MONTREAL; CANADA|; ADEMIE DES SCIENCES
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  • 4
    Publication Date: 2019-07-13
    Description: Cobalt chromium high temperature oxidation and scale formation
    Keywords: MATERIALS, METALLIC
    Type: ECS PAPER 413 , ELECTROCHEMICAL SOCIETY, MEETING; Oct 06, 1968 - Oct 11, 1968; MONTREAL; CANADA|; ADEMIE DES SCIENCES
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  • 5
    facet.materialart.
    Unknown
    In:  Other Sources
    Publication Date: 2019-07-13
    Description: Oxidation has been studied both as a function of temperature in the range from 900 to 1300 C and of the partial pressure of oxygen in the range from 0.05 to 760 torr. In addition, microstructures of oxide scales have been studied and characterized in more detail utilizing metallographic and X-ray techniques combined with electron microprobe analysis. The parabolic rate constants in 1100 C and at 100 and 10 torr oxygen are presented in a graph as a function of chromium content. Three main different mechanisms of oxidation in the Co-Cr system have been identified. In two of these, the rate determining process controlling the oxidation is the solid state diffusion of cobalt through the oxide CoO. The rate controlling process governing the oxidation for the third mechanism is chromium diffusion in dichromium trioxide.
    Keywords: MATERIALS, METALLIC
    Type: International Congress on Metallic Corrosion; Sep 07, 1969 - Sep 14, 1969; Amsterdam; Netherlands
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Oxidation of metals 2 (1970), S. 101-117 
    ISSN: 1573-4889
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The influence of vacuum annealing treatments on the oxidation rate of Co-10 w/o Cr has been studied at 900°C and 1100°C in 100 Torr oxygen. The oxidation rate posttreatment has been found to decrease markedly with the length of the vacuum annealing period. At 900°C this effect is maintained for all periods of reoxidation studied but at 1100°C the effect of vacuum annealing disappears after a period of slow reoxidation. It is assumed that the decrease of the oxidation rate is due to an increase in the amount of CoCr2O4 in the inner layer.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 21 (1970), S. 894-899 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Über die Oxydation von Co-35% bei hohen TemperaturenDas Oxydationsverhalten von streifen- und kugelförmigen Proben von Co mit 35 Gew.-% Cr wurde im Temperaturbereich 900 bis 1300°C und bei Sauerstoffdrucken von 0,2 bis 760 Torr untersucht. Die Oxydation der streifenförmigen Proben verläuft bei und unter 1100°C etwa parabolisch. Auf ebenen Oberflächen entstehen schützende Cr2O3-Schichten. An Ecken und Kanten ist die Oxydation beschleunigt, und dort enthält das Oberflächenoxid auch CoCr2O4. Die Oxydation der kugelförmigen Proben verläuft nicht nach einem parabolischen Zeitgesetz; die Zunderschicht besteht in diesem Falle aus Cr2O3, CoCr2O4 und verstreuten CoO-Teilchen. Im Anfangsstadium der Oxydation werden kugelförmige Proben schneller angegriffen als die Flachproben.
    Notes: The oxidation behaviour of coupon and spherical specimens of Co-35 w/o Cr have been studied in the temperature range 900-1300°C and at oxygen pressures from 0.2 to 760 torr. For coupon specimens the oxidation is approximately parabolic at and below 1100°C. Protective scales of Cr2O3 are formed on flat surfaces. Corners and edges show enhanced oxidation, and in these regions the surface oxide also contains CoCr2O4. Oxidation of spherical specimens is nonparabolic and the oxide scales consist of Cr2O3, CoCr2O4, and interspersed particles of CoO. During initial oxidation spherical specimens oxidize faster than coupon specimens.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
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