A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fractography, a Tool for the Failure Characterization of Engineering Ceramics
Abstract Engineering ceramics are a family of advanced materials that exhibit a combination of very good mechanical properties not only at room but also at high temperatures. Major applications of these ceramics include wear components, cutting tools, and chemical resp. temperature resistant parts. Their wide application is, however, still limited mainly due to their brittleness, low flaw tolerance and low reliability. Efforts made during the last decade have resulted in a remarkable progress in this held. The main ways resulting in the improvement of mechanical properties of engineering ceramics can be summarized as follows; At room temperature improving the strength level and reducing the strength values scatter, i.e., enhancing the reliability by reduction of the critical defect size ( improved properties of powders, clean room manufacturing, etc.) — the flaw diminution approach, [1,2], promoting the localized bridging behind the crack tip (as frictional and mechanical interlocking, or pull-out) by which the flaw tolerance of the material can be improved — the flaw tolerance approach, [3,4] improving the strength values by incorporating nano-sized, second-phase particles with different expansion coefficients into the matrix — the nano-particle dispersion strengthening, [5] improving the structural reliability by designing novel laminar composites with a promoted crack deflection at the interlayer boundaries and using the compressive residual stresses arisen during cooling down from the sintering temperature because of the differences in the thermal expansion coefficients between the layers that have different composition — the laminar structure approach, [6,7]; At high temperatures Optimizing the grain size and the grain boundary phase’s geometry and composition with the aim to improve the high temperature strength of these materials, [8,9].
Fractography, a Tool for the Failure Characterization of Engineering Ceramics
Abstract Engineering ceramics are a family of advanced materials that exhibit a combination of very good mechanical properties not only at room but also at high temperatures. Major applications of these ceramics include wear components, cutting tools, and chemical resp. temperature resistant parts. Their wide application is, however, still limited mainly due to their brittleness, low flaw tolerance and low reliability. Efforts made during the last decade have resulted in a remarkable progress in this held. The main ways resulting in the improvement of mechanical properties of engineering ceramics can be summarized as follows; At room temperature improving the strength level and reducing the strength values scatter, i.e., enhancing the reliability by reduction of the critical defect size ( improved properties of powders, clean room manufacturing, etc.) — the flaw diminution approach, [1,2], promoting the localized bridging behind the crack tip (as frictional and mechanical interlocking, or pull-out) by which the flaw tolerance of the material can be improved — the flaw tolerance approach, [3,4] improving the strength values by incorporating nano-sized, second-phase particles with different expansion coefficients into the matrix — the nano-particle dispersion strengthening, [5] improving the structural reliability by designing novel laminar composites with a promoted crack deflection at the interlayer boundaries and using the compressive residual stresses arisen during cooling down from the sintering temperature because of the differences in the thermal expansion coefficients between the layers that have different composition — the laminar structure approach, [6,7]; At high temperatures Optimizing the grain size and the grain boundary phase’s geometry and composition with the aim to improve the high temperature strength of these materials, [8,9].
Fractography, a Tool for the Failure Characterization of Engineering Ceramics
Dusza, Jan (author)
1997-01-01
17 pages
Article/Chapter (Book)
Electronic Resource
English
Fracture Surface , Fracture Toughness , Silicon Nitride , Compressive Residual Stress , Weibull Modulus Engineering , Industrial and Production Engineering , Materials Science, general , Ceramics, Glass, Composites, Natural Methods , Characterization and Evaluation of Materials , Inorganic Chemistry
Mechanical Failure of Advanced Ceramics: The Value of Fractography
| British Library Online Contents | 2002
Fractography in Failure Analysis of Polymers
| UB Braunschweig | 2015
Fractography of Advanced Ceramics - The CEN Pre-Standard
| British Library Online Contents | 2002
Failure analysis and fractography of polymer composites
| UB Braunschweig | 2009
| Wiley | 2018