Mechanical Characterization of Diesel Particulate Filter Substrates

Shyam, Amit; Watkins, Thomas R.; Parten, Randy J.

doi:10.1111/j.1551-2916.2008.02381.x

Cited by 31 publications

(51 citation statements)

References 21 publications

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“…[105, 107] The fracture toughness of brittle porous ceramics (isotropic structure) made of Al 2 O 3 ; Al 2 O 3 -ZrO 2 ; alumina-mullite [108] ; SiC [107] ; and cordierite has been tested. [106, 109] Only a few studies on the fracture toughness testing of porous glass and ceramic scaffold are available in the literature because of the difficulties in preparing large test specimens from weak scaffolds. [84] Fracture toughness values in the range of 0.2–0.6 MPa · m 1/2 are obtained for an isotropic glass (CaO–Al 2 O 3 –P 2 O 5 ) scaffold (porosity: 58–70% and pore size: 100–300 µm).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Toward Strong and Tough Glass and Ceramic Scaffolds for Bone Repair

Saiz

Rahaman

et al. 2013

Adv Funct Materials

208

142

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The need for implants to repair large bone defects is driving the development of porous synthetic scaffolds with the requisite mechanical strength and toughness in vivo. Recent developments in the use of design principles and novel fabrication technologies are paving the way to create synthetic scaffolds with promising potential for reconstituting bone in load-bearing sites. This article reviews the state of the art in the design and fabrication of bioactive glass and ceramic scaffolds that have improved mechanical properties for structural bone repair. Scaffolds with anisotropic and periodic structures can be prepared with compressive strengths comparable to human cortical bone (100–150 MPa), while scaffolds with an isotropic structure typically have strengths in the range of trabecular bone (2–12 MPa). However, the mechanical response of bioactive glass and ceramic scaffolds in multiple loading modes such as flexure and torsion — as well as their mechanical reliability, fracture toughness, and fatigue resistance — has received little attention. Inspired by the designs of natural materials such as cortical bone and nacre, glass-ceramic and inorganic/polymer composite scaffolds created with extrinsic toughening mechanisms are showing potential for both high strength and mechanical reliability. Future research should include improved designs that provide strong scaffolds with microstructures conducive to bone ingrowth, and evaluation of these scaffolds in large animal models for eventual translation into clinical applications.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Toward Strong and Tough Glass and Ceramic Scaffolds for Bone Repair

Saiz

Rahaman

et al. 2013

Adv Funct Materials

208

142

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“…The micro-cracks www.springer.com/journal/40145 J Adv Ceram 2018, 7(1): 5-16 9 are suggested to develop in cordierite during high temperature processing [22]. The level of porosity and the presence of micro-cracks can have impact on the mechanical properties of a cordierite [23,24].…”

Section: Physical Microstructural and Compositional Analyses Of Tmentioning

confidence: 99%

“…Depending on the sintering temperature, Suzuki et al [25] determined the fracture toughness of dense cordierite to range between 2 and 3 MPa·m 1/2 . The Young's modulus of cordierite has been reported to increase from 11.9 GPa at 23 ℃ to 16.3 GPa at 1000 ℃ while the Poisson ration remained nearly the same in this temperature range [24]. The increase in strength with increase in temperature was attributed to self-healing of the micro-cracks at high temperatures.…”

mentioning

confidence: 96%

“…The level of porosity and the presence of these micro-cracks will influence the mechanical properties of cordierite. Gordon et al [23] reported the fracture toughness of monolithic cordierite to be about 0.242 MPa·m 1/2 , while the cordierite investigated by Shyam et al [24] was determined to have fracture toughness that varies between 0.38 and 0.45 MPa·m 1/2 , depending on notch orientation. Fracture toughness of cordierite has been reported to decrease with increase in porosity [23].…”

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confidence: 99%

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Effects of regenerative mechanical vibration on the mechanical integrity of ceramic diesel particulate filters

et al. 2017

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Abstract:In this study, the effects of mechanical vibration on the mechanical properties of ceramic diesel particulate filters (DPFs) were investigated. The goal is to determine how the mechanical vibration used in the regenerative ash cleaning process for these filters affects their mechanical integrity during subsequent reuse. Both virgin and vibrated DPF samples were subjected to compressive and 3-point flexural loading at three different loading rates along axial and tangential directions. Statistical analysis was conducted to determine the significance of variation in the compressive and flexural strengths of the DPFs as a result of exposure to mechanical vibration. The results show that there is no statistically significant difference in both compressive and flexural strengths of the virgin DPFs and the DPFs subjected to the same level of mechanical vibration typically used in ash cleaning of DPFs. When the intensity of vibration was doubled, the drop in compressive strength became statistically significant, but less than 10% under axial loading. However, no drop in flexural strength was observed for DPFs subjected to this high intensity of mechanical vibration. The safe threshold for mechanical vibration of ceramic filters is considered to be much higher than that currently used in vibration-based ash cleaning process.

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“…이 중에서도 기공크기(pore size)가 50 nm보다 큰 매크 로포러스 세라믹(macroporous ceramics)는 디젤입자 흡착 필터(diesel particulate filters) [1][2][3], 정수필터 (water purification filters) [4], 금속 캐스팅용 발포 필 터(foam filters for metal casting) [5], 바이오 반응기 (bioreactor) [6,7], 전기화학반응 전극(electrochemical electrode) [8], 전자세라믹스(electro-ceramics) [9], 내화물(refractories) [10,11] …”

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