Ebook: Non-Oxide Technical and Engineering Ceramics

Conferences on technical and engineering ceramics are held with increasing frequency, having become fashionable because the potential of ceramics in profitable growth industries is an urgent matter of considerable debate and discussion. Japanese predictions are that the market value of ceramics will grow 10 at about 10% per annum to reach at least $10 by the end of the century. Seventy per cent of this market will be in electroceramics, applications for which include insulating substrates in integrated circuits, ferroelectric capacitors, piezoelectric oscillators and transdu­ cers, ferrite magnets, and ion-conducting solid electrolytes and sen­ sors. All these are oxides, and so are excluded by the title of the Limerick Conference. Why 'Non-oxide'? The other major ceramics potential is in struc­ tural engineering components and engine applications. Here, the greatest impetus to research and development has been the attempt to produce a ceramic gas turbine. Heat engines become more efficient as their working temperature increases, but nickel-base superalloy en­ gines have about reached their limit. Compared with metals, ceramics have higher strengths at high temperatures, better oxidation and corrosion resistance, and are also less dense. In general, ceramics have better properties above about 1000°C except in one respect-their inherent brittleness. The work of fracture is therefore much smaller than for metals and so the permitted flaw size is also smaller.

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Content:
Front Matter....Pages i-xiv
Sialons: A Study in Materials Development....Pages 1-30
Discussion Session: Aspects of Commercialisation of Advanced Ceramics and Future Opportunities....Pages 31-39
Analysis of Coarsening and Densification Kinetics During the Heat Treatment of Nitrogen Ceramics....Pages 41-51
Sinterability of Silicon Nitride Powders and Characterisation of Sintered Materials....Pages 53-68
Microstructural Development and Secondary Phases in Silicon Nitride Sintered with Mixed Neodymia/Magnesia Additions....Pages 69-82
Microstructural Development, Microstructural Characterization and Relation to Mechanical Properties of Dense Silicon Nitride....Pages 83-96
Sialon and Syalon Powders: Production, Properties and Applications....Pages 97-104
Reaction Sequences in the Preparation of Sialon Ceramics....Pages 105-117
Preparation and Densification of Nitrogen Ceramics from Oxides....Pages 119-132
Preparation of Sialon Ceramics from Low Cost Raw Materials....Pages 133-147
Densification Behaviour of Sialon Powders Derived from Aluminosilicate Minerals....Pages 149-164
Sintering and some Properties of Si3N4 Based Ceramics....Pages 165-174
Syalon Ceramic for Application at High Temperature and Stress....Pages 175-190
Structural Evolution under High Pressure and at High Temperature of a ?’-Sialon Phase....Pages 191-202
Multianion Glasses....Pages 203-212
Non-destructive Evaluation of Ceramic Surfaces and Sub-surfaces....Pages 213-221
Preparation and Characterization of Yttrium ?’-Sialons....Pages 223-230
Characterisation and Properties of Sialon Materials....Pages 231-254
Comparison of CBN, Sialons and Tungsten Carbides in the Machining of Surgical Implant Alloys and Cast Irons....Pages 255-279
The Wear Behaviour of Sialon and Silicon Carbide Ceramics in Sliding Contact....Pages 281-298
Studies on Properties of Low Atomic Number Ceramics as Limiter Materials for Fusion Applications....Pages 299-300
Effect of Microstructural Features on the Mechanical Properties of REFEL Self-bonded Silicon Carbide....Pages 301-317
Failure Probability of Shouldered and Notched Ceramic Components Using Neuber Notch Theory....Pages 319-339
Characterisation and Mechanical Properties of Hot-pressed and Reaction-bonded Silicon Nitride....Pages 341-359
Tensile Strength of a Sintered Silicon Nitride....Pages 361-374
Selecting Ceramics for High Temperature Components in IC Engines....Pages 375-395
Oxidative Removal of Organic Binders from Injection-molded Ceramics....Pages 397-408
Silicon Nitride Ceramics and Composites: A View of Reliability Enhancement....Pages 409-431
Panel Discussion: Aspects of Reliability....Pages 433-437
Back Matter....Pages 439-458

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Content:
Front Matter....Pages i-xiv
Sialons: A Study in Materials Development....Pages 1-30
Discussion Session: Aspects of Commercialisation of Advanced Ceramics and Future Opportunities....Pages 31-39
Analysis of Coarsening and Densification Kinetics During the Heat Treatment of Nitrogen Ceramics....Pages 41-51
Sinterability of Silicon Nitride Powders and Characterisation of Sintered Materials....Pages 53-68
Microstructural Development and Secondary Phases in Silicon Nitride Sintered with Mixed Neodymia/Magnesia Additions....Pages 69-82
Microstructural Development, Microstructural Characterization and Relation to Mechanical Properties of Dense Silicon Nitride....Pages 83-96
Sialon and Syalon Powders: Production, Properties and Applications....Pages 97-104
Reaction Sequences in the Preparation of Sialon Ceramics....Pages 105-117
Preparation and Densification of Nitrogen Ceramics from Oxides....Pages 119-132
Preparation of Sialon Ceramics from Low Cost Raw Materials....Pages 133-147
Densification Behaviour of Sialon Powders Derived from Aluminosilicate Minerals....Pages 149-164
Sintering and some Properties of Si3N4 Based Ceramics....Pages 165-174
Syalon Ceramic for Application at High Temperature and Stress....Pages 175-190
Structural Evolution under High Pressure and at High Temperature of a ?’-Sialon Phase....Pages 191-202
Multianion Glasses....Pages 203-212
Non-destructive Evaluation of Ceramic Surfaces and Sub-surfaces....Pages 213-221
Preparation and Characterization of Yttrium ?’-Sialons....Pages 223-230
Characterisation and Properties of Sialon Materials....Pages 231-254
Comparison of CBN, Sialons and Tungsten Carbides in the Machining of Surgical Implant Alloys and Cast Irons....Pages 255-279
The Wear Behaviour of Sialon and Silicon Carbide Ceramics in Sliding Contact....Pages 281-298
Studies on Properties of Low Atomic Number Ceramics as Limiter Materials for Fusion Applications....Pages 299-300
Effect of Microstructural Features on the Mechanical Properties of REFEL Self-bonded Silicon Carbide....Pages 301-317
Failure Probability of Shouldered and Notched Ceramic Components Using Neuber Notch Theory....Pages 319-339
Characterisation and Mechanical Properties of Hot-pressed and Reaction-bonded Silicon Nitride....Pages 341-359
Tensile Strength of a Sintered Silicon Nitride....Pages 361-374
Selecting Ceramics for High Temperature Components in IC Engines....Pages 375-395
Oxidative Removal of Organic Binders from Injection-molded Ceramics....Pages 397-408
Silicon Nitride Ceramics and Composites: A View of Reliability Enhancement....Pages 409-431
Panel Discussion: Aspects of Reliability....Pages 433-437
Back Matter....Pages 439-458
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