Strength and scaling resistance of a composite based on zirconium diboride

Pankov, G. A.; Fomina, G. A.; Иванов, Д. А.; Val’yano, G. E.

doi:10.1007/bf02227282

Cited by 5 publications

(4 citation statements)

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“…Attempts have been made to improve the oxidation resistance of ZrB 2 ‐based materials through appropriate additives 19–22 . For temperatures above 1200°C, the addition of SiC provides improved oxidation resistance by encouraging the formation of a borosilicate glass layer on exposed surfaces, which results in reduced oxygen transport 1,21,23,24 .…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Zirconium Diboride–Silicon Carbide at 1500°C at a Low Partial Pressure of Oxygen

Rezaie

Fahrenholtz

Hilmas

2006

Journal of the American Ceramic Society

154

113

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The oxidation behavior of zirconium diboride containing 30 vol% silicon carbide particulates was investigated under reducing conditions. A gas mixture of CO and B350 ppm CO 2 was used to produce an oxygen partial pressure of B10 À10 Pa at 15001C. The kinetics of the growth of the reaction layer were examined for reaction times of up to 8 h. Microstructures and chemistries of reaction layers were characterized using scanning electron microscopy and X-ray diffraction analysis. The kinetic measurements, the microstructure analysis, and a thermodynamic model indicate that oxidation in CO-CO 2 produced a non-protective oxide surface scale. J ournal

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Section: Introductionmentioning

confidence: 99%

Oxidation of Zirconium Diboride–Silicon Carbide at 1500°C at a Low Partial Pressure of Oxygen

Rezaie

Fahrenholtz

Hilmas

2006

Journal of the American Ceramic Society

154

113

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“…Many attempts have been made to enhance the oxidation resistance of ZrB 2 ‐based materials through the use of appropriate additives. The most common additive is SiC, which enhances the oxidation resistance via the formation of SiO 2 as well as mechanical properties and sinterability . The oxidation behaviors of ZrB 2 –SiC composites have been well‐defined previously .…”

Section: Introductionmentioning

confidence: 99%

“…The most common additive is SiC, which enhances the oxidation resistance via the formation of SiO 2 1,16 as well as mechanical properties and sinterability. [17][18][19][20] The oxidation behaviors of ZrB 2 -SiC composites have been well-defined previously. [21][22][23][24] When ZrB 2 -SiC composite is exposed to oxidizing environments (at a temperature of 1500°C), it forms a layer structure consisting of the following (1) a continuous, silica-rich layer, (2) an SiC depletion layer, and (3) an unreacted layer.…”

Section: Introductionmentioning

confidence: 99%

TEM Study of the High‐Temperature Oxidation Behavior of Hot‐Pressed ZrB₂–SiC Composites

2013

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The oxidation behaviors of ZrB2‐ 30 vol% SiC composites were investigated at 1500°C in air and under reducing conditions with oxygen partial pressures of 104 and 10−8 Pa, respectively. The oxidation of ZrB2 and SiC were analyzed using transmission electron microscopy (TEM). Due to kinetic difference of oxidation behavior, the three layers (surface silica‐rich layer, oxide layer, and unreacted layer) were observed over a wide area of specimen in air, while the two layers (oxide layer, and unreacted layer) were observed over a narrow area in specimen under reducing condition. In oxide layer, the ZrB2 was oxidized to ZrO2 accompanied by division into small grains and the shape was also changed from faceted to round. This layer also consisted of amorphous SiO2 with residual SiC and found dispersed in TEM. Based on TEM analysis of ZrB2–SiC composites tested under air and low oxygen partial pressure, the ZrB2 begins to oxidize preferentially and the SiC remained without any changes at the interface between oxidized layer and unreacted layer.

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“…22 A number of additives have been used to improve the oxidation resistance of ZrB 2 -based materials. [23][24][25][26] The addition of SiC improves oxidation resistance at temperatures above 1200 • C by promoting the formation of a borosilicate glass layer, which reduces oxygen permeability on exposed surfaces. The layer provides passive oxidation behavior resulting in parabolic mass gain kinetics, which reduces the oxidation rate compared to pure ZrB 2 .…”

Section: Introductionmentioning

confidence: 99%

The effect of a graphite addition on oxidation of ZrB2–SiC in air at 1500°C

Rezaie

Fahrenholtz

Hilmas

2013

Journal of the European Ceramic Society

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Strength and scaling resistance of a composite based on zirconium diboride

Cited by 5 publications

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Oxidation of Zirconium Diboride–Silicon Carbide at 1500°C at a Low Partial Pressure of Oxygen

Oxidation of Zirconium Diboride–Silicon Carbide at 1500°C at a Low Partial Pressure of Oxygen

TEM Study of the High‐Temperature Oxidation Behavior of Hot‐Pressed ZrB₂–SiC Composites

The effect of a graphite addition on oxidation of ZrB2–SiC in air at 1500°C

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Strength and scaling resistance of a composite based on zirconium diboride

Cited by 5 publications

References 0 publications

Oxidation of Zirconium Diboride–Silicon Carbide at 1500°C at a Low Partial Pressure of Oxygen

Oxidation of Zirconium Diboride–Silicon Carbide at 1500°C at a Low Partial Pressure of Oxygen

TEM Study of the High‐Temperature Oxidation Behavior of Hot‐Pressed ZrB2–SiC Composites

The effect of a graphite addition on oxidation of ZrB2–SiC in air at 1500°C

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TEM Study of the High‐Temperature Oxidation Behavior of Hot‐Pressed ZrB₂–SiC Composites