Influence of SiC whisker morphology and nature of SiC/Al2O3 interface on thermomechanical properties of SiC reinforced Al2O3 composites

Garnier, Vincent; Fantozzi, Gilbert; Nguyen, Duc Nam; DuBois, J. Harry; Thollet, G.

doi:10.1016/j.jeurceramsoc.2004.09.026

Cited by 50 publications

(28 citation statements)

References 24 publications

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“…And then the values significantly decreased with the filler mass fraction increased, but not less than 10%PTFE/PEEK blend (12.1 KJ·m -2 ). The impact properties were mainly associated with the inherent properties of whiskers and matrix, whisker content, geometry, arrangement and interfacial bonding strength [29][30][31]. The most important of these was interfacial bonding strength, which affected the absorption of impact energy by affecting the fracture mode of the material.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Effects of Potassium Titanate Whisker or Glass Fiber on Tribological and Mechanical Properties of PTFE/PEEK Blend

Teng

Wen

et al. 2017

Preprint

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Abstract:In this study, 10%PTFE/PEEK blend were modified by potassium titanate whisker (PTW) and chopped glass fiber (GF), respectively. The blends were prepared by three-screw extruder. Through the investigation of thermal stability, tribological properties, mechanical properties and rheological behavior, the effects of reinforcing agents were determined. The results illustrated that the mechanical properties of 10%PTFE/PEEK blend can be dramatically improved by adding reinforcing agent of PTW or GF, and the reinforcing effect of GF was especially obvious. As for tribological properties, 1% addition was the best proportion. The friction coefficient and wear rate of the blend with 1% PTW were 0.283 and 4.97 × 10 -6 mm 3 /N · m, which decreased by 7.2% and 21% compared with those of the blend without reinforcing agent.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Effects of Potassium Titanate Whisker or Glass Fiber on Tribological and Mechanical Properties of PTFE/PEEK Blend

Teng

Wen

et al. 2017

Preprint

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“…Formation of cavities instead of glassy phase implies generation of gaseous products [37], where SiC (s) + 2·SiO 2(s) = 3·SiO (g) + CO (g) and SiC (s) +O 2(g) = SiO (g) +CO (g) are the two plausible reactions of whisker degradation [14], yet both are expected at temperatures above intrinsic to the machining of Alloy 718.…”

Section: Cracking Plastic Deformation and Whisker Degradationmentioning

confidence: 99%

“…Brandt et al [2] found that intensity of minor notch is speed dependent and suggested chemical wear as notch formation mechanism. High temperatures of above 1200-1400º C required for chemical reactions in Al 2 O 3 -SiC system [14]. Significantly lower temperatures on the tool flank [1] especially in the surface formation region [15] suggest that chemical wear is not the dominant contributor to the wear mechanisms in the minor notch.…”

Section: Introductionmentioning

confidence: 99%

Wear mechanisms of silicon carbide-whisker-reinforced alumina (Al2O3–SiCw) cutting tools when high-speed machining aged Alloy 718

Bushlya

Zhou

Avdovic

et al. 2013

Int J Adv Manuf Technol

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Link to publicationCitation for published version (APA): Bushlya, V., Zhou, J., Avdovic, P., & Ståhl, J-E. (2013). Wear mechanisms of silicon carbide-whisker-reinforced alumina (Al2O3-SiCw) cutting tools when high-speed machining aged Alloy 718. International Journal of Advanced Manufacturing Technology, 68(5-8), 1083 -1093 . DOI: 10.1007 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Bushlya, V., Zhou, J., Avdovic, P., Ståhl, J. AbstractThe paper is aimed on identification and characterization of wear mechanisms of SiC whisker reinforced alumina when turning aged Alloy 718 under different cutting conditions and when machining dry and with coolant. Secondary and back-scatter electron microscopy accompanied by focus ion beam milling and EDX techniques were used for analysis of worn-out tools. Notch wear on the major cutting edge was found to consist of two notches: depth-of-cut notch and secondary notch located outside the chip area. The last was found to be governed by adhesion and attrition associated with adverse chip flow conditions. Formation of minor notch was related to attrition by the defects found on the machined surface. Diffusion of Ni, Fe and Cr into SiC whiskers was found to degrade them and facilitate adhesion. Chemical wear mechanisms were found to be responsible for degradation and decomposition of whiskers and formation of tribolayer on tool surfaces, which in turn was related to the reduced adhesion of Alloy 718 on the tool. Cracking on the tool rake and localized plastic deformation were found to further accelerate tool deterioration.

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“…Without such cleaning, it is common for amorphous interfacial phases composed of Al, Si, and O to form around the whiskers during hot pressing and this generally results in composites exhibiting inhibited whisker pull-out, crack bridging, and deflection due to excessively-high interfacial bonding strength. An example of such a glassy phase coating a whisker is shown in Figure 15b and was correlated to a fracture toughness reduced by 22% (Garnier et al, 2005).…”

Section: Effects Of Whisker Defect Structures and Interfaces On Variomentioning

confidence: 99%

Properties and Applications of Ceramic Composites Containing Silicon Carbide Whiskers

Bertram¹,

Gerhardt²

2011

Properties and Applications of Silicon Carbide

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Influence of SiC whisker morphology and nature of SiC/Al2O3 interface on thermomechanical properties of SiC reinforced Al2O3 composites

Cited by 50 publications

References 24 publications

Effects of Potassium Titanate Whisker or Glass Fiber on Tribological and Mechanical Properties of PTFE/PEEK Blend

Effects of Potassium Titanate Whisker or Glass Fiber on Tribological and Mechanical Properties of PTFE/PEEK Blend

Wear mechanisms of silicon carbide-whisker-reinforced alumina (Al2O3–SiCw) cutting tools when high-speed machining aged Alloy 718

Properties and Applications of Ceramic Composites Containing Silicon Carbide Whiskers

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