Fracture Toughness and Work of Fracture of SiC-Fibre Reinforced Glass Matrix Composite

Dlouhý, Ivo; Reinisch, M.; Boccaccını, Aldo R.

doi:10.1007/978-1-4757-4019-6_16

Cited by 8 publications

(11 citation statements)

References 13 publications

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“…In a preliminary attempt to asses the possibility of determining thermal shock damage by fracture toughness measurements, this property was measured by the chevron notched specimen technique on selected samples after thermal shock tests. The applicability of chevron notch (CN) technique and fracture toughness determination for similar purposes has been proved on Nicalon fibre reinforced borosilicate glass matrix composites exposed to repeated thermal shocks 14 and on hybrid glass ceramic composites after thermal cycling. 15 Because parameter R indicates the resistance of the refractories to fracture initiation after thermal shock, it was assumed that the calculation of this parameter after a relatively low number of thermal shock cycles could be used to detect crack initiation in its onset.…”

Section: Introductionmentioning

confidence: 99%

Thermal shock behaviour of mullite–cordierite refractory materials

Boccaccini

Leonelli

Romagnoli

et al. 2007

Advances in Applied Ceramics

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The characterisation of thermal shock damage in cordierite-mullite refractory plates used as substrates in fast firing of porcelain whiteware has been investigated. Two different refractory compositions (termed REFO and CONC), characterised by different silica to alumina ratios, were studied. Thermal shock damage was induced in as received samples by water quenching tests from 1250uC. Thermal and mechanical properties were measured at room temperature by means of standard techniques and then the thermal shock resistance parameter R was calculated. The fracture toughness of selected samples was measured before and after thermal shock by the chevron notched specimen technique. The reliability of this technique for evaluation of small differences in fracture toughness after a given number of thermal shock cycles was investigated. The suitability of K Ic measurements by the chevron notched specimen technique to characterise the development of thermal shock damage in refractory materials was proved in this investigation.

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Section: Introductionmentioning

confidence: 99%

Thermal shock behaviour of mullite–cordierite refractory materials

Boccaccini

Leonelli

Romagnoli

et al. 2007

Advances in Applied Ceramics

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“…Commercially available unidirectional SiC Nicalon (NL202) fibre reinforced borosilicate (DURAN®) glass matrix composites have been investigated [10,21,22]. The fibre volume fraction was 0.4; fairly regular fibre distribution and the absence of porosity were found [21].…”

Section: Sic Fibre Reinforced Glass Matrix Compositesmentioning

confidence: 99%

Fracture Behaviour of Brittle (Glass) Matrix Composites

Dlouhý

Chlup

Boccaccını

2005

MSF

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A number of examples exist that indicate the potential for increasing the toughness of brittle matrices by dispersing different reinforcements. For further development of these advanced materials the actual material response during mechanical loading under presence of flaws appears to be important. Theoretical and experimental knowledge acquired on different kinds of brittle matrix composites is summarised in the paper. These include glass matrix composites with metallic particles, alumina platelets, continuous SiC (Nicalon®) fibres, and both chopped fibres and ZrO2particles (hybrid composites). The composites were tested in as-received state but also after different forms of thermomechanical loading, e.g. thermal shock, thermal cycling in air, which were investigated according to the envisaged composites application. Chevron notch technique was mainly used for fracture toughness evaluation. Microstructural damage is explained based on identified fracture micromechanisms.

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“…Studies on the tensile and compressive response of Silicon Carbide fiber reinforced lithium aluminosilicate glass ceramics have shown that the stress-strain characteristics of these unidirectional composites in combination with knowledge of residual stresses present in the matrix [4,5]. Although the mechanical response of continuous ceramic fiber reinforced CMCs is being extensively studied under conditions of static loading [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], only limited information is available in the literature on the response to dynamic loading at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…Recent processing developments have yielded ceramic matrix composites (CMCs) with improved mechanical properties which have led to a resurgence of interest in the use of reinforced ceramic composites for structural applications [9][10][11][12]. In CMCs that exhibit at room temperature tough behavior and high tensile strength, in most cases fibers remain intact during matrix fracture, resulting in periodic matrix cracks and post cracking stress or load sustaining capability.…”

Section: Introductionmentioning

confidence: 99%