Ceramic microstructural mechanisms

Silvestroni, L., Guicciardi, S., Melandri, C., Sciti, D. (2012). TaB -hased ceramics Microstructure, mechanical properties and oxidation resistance. Journal of the European Ceramic Society, 32, 97-105. doi 10.1016/j.jeurceramsoc.2011.07.032. 

Finally, the nature of the crystalline microstructure, ie, crystal size and morphology and the textural relationship among the crystals and glass, is the key to many mechanical and optical properties, including transparency/opacity, strength and fracture toughness, and machinability. These microstructures can be quite complex and often are distinct from conventional ceramic microstructures (6). 

C. F. Chen and T. Y. Tien, High temperature mechanical properties of SiAION ceramics Microstructural effect. Ceram. Eng. and Sci Proc. 8 (7-8), 778-795 (1987). 

The dried xerogel must be stabilised by heating to a sufficiently high temperature to obtain a microstructural, mechanical and chemical stable ceramic membrane layer. 

Ananthakumar S., Jayasankar M., Warrier K.G.K.. Microstructural, mechanical and thermal characterisation of sol-gel derived aluminium titanate-mullite ceramic composites. Acta Materialia, 2006,54 2965-2973... 

Ferrites are complex because they combine two complex areas ceramic microstructures and magnetic phenomena. Ceramic microstructures, formed as a result of physico-chemical processes such as solid-state sintering, are affected by a large number of interacting variables the essentially quantum-mechanical nature of their magnetic properties makes them difficult to comprehend, since they are entirely different to macroscopic, every-day experience. The approach to ferrites their synthesis/fabrication the relationship between crystal structure, texture and physical properties the modelling of magnetic interactions, is of necessity interdisciplinary. 

N. Ricca, A. Guette, G. Camus and J. M. Jouin, SiC (ex-PCS)/MAS Composites with a BN Interphase Microstructure, Mechanical Properties and Oxidation Resistance, in High Temperature Ceramic Matrix Composites, Vol. 1, R. Naslain, J. Lamon and D. Doumeingts eds., Woodhead Publ. Ltd. (1993) 455- 62. 

The research efforts made to tailor ceramic microstructure so as to improve properties are described in this chapter. Although many material properties are affected by the microstructure, the emphasis here is placed on the mechanical properties, especially strength and fracture toughness. In particular, attention is focused on silicon nitride ceramics, the mechanical properties of vhich have been improved substantially through microstructure tailoring during the past tv o decades. 

The development of the lithium disilicate glass-ceramic, its mechanisms of controlled crystallization, as well as the microstructure formation, and its properties are described in Section 2.1.1. The application of the glass-ceramics in high-precision equipment components and in the electrical industry is addressed in Section 4.1.2. 

R. B. Zhang, D. N. Fang, Y. M. Pei, L. C. Zhou, Microstructure, mechanical and dielectric properties of highly porous silicon nitride ceramics produced by a new water-based freeze casting, Ceram. Int, 38,4373-4377 (2012). 

A review of Slow Crack Growth (SCG) results obtained for different oxide and nonoxide ceramics at ambient temperature, under different enviromnents, is presented. They are analyzed on the basis of their crack velocity (V) versus stress intensity factor (Ki) diagrams. The aim of this paper is to consider mechanisms acting at the crack tip (i.e. at the nano-scale) and microstructural mechanisms occurring in the crack wake or at the crack front (i.e. at the micro-scale) to rationalize the approach of SCG. 

Processing - microstructure - mechanical properties correlations Ceramics composites joining and testing NDE of ceramic components... 

Mazzocchi M, Bellosi A. On the possibility of silicon nitride as a ceramic for structural orthopaedic implants. Part I processing, microstructure, mechanical properties, cytotoxicity. J Mater Sci Mater Med 2008 19(8) 2881-7. 

Section II, which focuses entirely on ceramics, is divided into nine chapters (Chapters 8-16). Each chapter contains problems to be solved. Chapter 8 deals with bonding and Chapter 9 is on structures of ceramics. Chapter 10 deals with defects in ceramics. Ceramics microstructures are covered in Chapter 11. Chapter 12 covers the production of ceramic powders starting from the raw materials. It also includes powder characterization. Four forming methods are described in Chapter 13. Chapter 14 discusses three types of thermal treatments. Mechanical properties are the subject matter of Chapter 15. Chapter 16 addresses thermal and thermo-mechanical properties. 

Zhou, S. B., Wang, Z., Sun, X., Han, J. C. (2010). Microstructure, mechanical properties and thermal shock resistance of zirconium diboride containing silicon carbide ceramic toughened by carbon black. Materials Chemistry and Physics, 722(2-3), 470 73. doi 10.1016/j.matchemphys.2010.03.028. 

Microfabrication of the parallel channels was performed by mechanical surface cutting of metal tapes [31]. In the case of aluminum alloys, ground-in monocrystalline diamonds were used [45]. In the case of iron alloys, ceramic micro tools have to be used owing to the incompatibility of diamonds with that material. Such a microstructured platelet stack is provided with top and cover plates, diffusion bonded and connected to suitable fittings for the inlet and withdrawal ducts by electron beam welding (Figure 3.9). 

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