Particle Impact Damage in Silicon Nitride

Shockey, D. A.; Rowcliffe, D. J.; Dao, K. C.; Seaman, L.

doi:10.1111/j.1151-2916.1990.tb09804.x

Cited by 39 publications

(16 citation statements)

References 5 publications

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“…Considerable effort has been expended develop methods for evaluating silicon carbide (SiC) or erosion-related ceramic and ceramic composite materials used in engineering components in such applications as gas turbine parts, sealing bearings, and burner parts [42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58]. These applications may involve solid-particle impact and erosive wear, and it is therefore necessary to have some knowledge of behaviours and mechanisms before the materials can be used with confidence.…”

Section: Introductionmentioning

confidence: 99%

Erosive Wear Mechanism of New SiC/SiC Composites by Solid Particles

Suh

Hinoki

2010

Tribol Lett

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A solid-particle erosive wear test by impinging silicon carbide (SiC) powders was carried out at room temperature over a range of median particle sizes of 425-600 lm, speed of 100 m/s and impact angle of 90°a nd assessed by wear measurements and scanning electron microscopy. Erosive wear behaviour was examined on newly fabricated nano-powder infiltration and transient eutectoid (NITE) SiC/SiC composites and two commercial composites by the chemical vapour infiltration (CVI) and NITE fabrication route. Microstructural observation was performed to examine the correlation between erosive wear behaviours and fabrication impurities. Conspicuous defects were observed in the prototype materials as the forms of porosity, fibre deformation, residual oxide, pyrolytic carbon (PyC) deformation, PyC cleavage, among others. Erosive wear behaviour was rather serious in the prototype of fabricated composites, which employ pre-SiC fibre and phenolic resin. Two dominant erosive wear mechanisms were observed: delamination of constituents, mainly caused by erosive crack propagation, and fragmentation and detachment of constituents, which usually resulted from erosive impact. A unit size of delamination was the most decisive factor affecting wear volume. The bonding strength of each constituent was mostly affected by various forms of porosities. Therefore, the fundamental cause and subsequent results must be carefully elucidated. The correlation of microstructural defect and wear behaviour was investigated with the aim of reducing dominant wear by improving fabrication conditions. The final product of the cost-effective composite had a 2.5-fold higher resistance than the commercial CVI composite. Consequently, by controlling fabrication impurities, we have been successful in developing and improving a new fabrication technique; consequently, the known defects are rarely observed in final product. A schematic wear model of erosive wear mechanisms is proposed for the newly fabricated SiC/SiC composites under particle erosion.

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Section: Introductionmentioning

confidence: 99%

Erosive Wear Mechanism of New SiC/SiC Composites by Solid Particles

Suh

Hinoki

2010

Tribol Lett

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“…Figure 8.2 shows the sequence as portrayed by Cherepanov (1979). Figure 8.3 illustrates a well developed crack system observed by Shockey et al (1990).…”

Section: Phenomenologymentioning

confidence: 96%

Initiation and Propagation of Damage Caused by Impact on Brittle Materials

Bless¹,

Rajendran²

1996

High-Pressure Shock Compression of Solids II

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“…He demonstrated the cone crack as the main damage mechanism for the composite target. And also some other researchers showed the cone crack formation in ceramics subjected to ballistic impact (Shockey et al, 1990a(Shockey et al, , 1990bCurran et al, 1993). Roeder and Sun (2001) investigated the effects of structural layering and thermal residual stresses on the impact resis-0924-0136/$ -see front matter © 2007 Elsevier B.V. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%