Download or read book The Development of the Mechanical Strength of Reaction Bonded Silicon Nitride written by A. J. Moulson and published by . This book was released on 1978 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes research aimed at furthering understanding of the nature and mechanism of development of the bond in RBSN. The project formed a part of an overall programme aimed at securing control of the microstructure of RBSN and, in consequence, over the mechanical properties of the ceramic. The study embraced three grades of starting silicon powder: a specially prepared high purity powder (99.99% Si), a similar powder contaminated with Fe (approx. 10 ppm Fe), and a commercial powder (approx. 98% Si; 0.5% Fe; 1.5% AL). Sonic Young's modulus was determined at stages throughout the nitriding reaction for all three powders and the data correlated with microstructural observations. In the case of the high-purity silicon powder it was concluded that the bond forms as a result of the deposition of massive, vapour-formed, Si3N4, and that Si3N4 'whisker' formation played no part in the bonding process. It was also observed that RBSN made from the two higher purity powders had Young's modulus values significantly higher than commonly encountered. A 3-phase composite model developed by Cohen and Ishai satisfactorily described the rate of development of Young's modulus with extent of reaction. (Author).
Download or read book Mechanical Properties of Laser Synthesized Reaction Bonded Silicon Nitride written by William A. Dunlay and published by . This book was released on 1987 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Machining Induced Defects on the Mechanical Strength of High Purity Reaction Bonded Silicon Nitride written by David W. Lum and published by . This book was released on 1986 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effective Control of the Microstructure of Reaction Bonded Silicon Nitride Si3N4 as Related to Improved Mechanical Properties written by Stephen Crosby Danforth and published by . This book was released on 1978 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Properties of Porous High Temperature Structuarl Materials written by Ali S. Argon and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gelcasting of Sintered Reaction bonded Silicon Nitride for Improved Mechanical Properties written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Iron on the Microstructure and Mechanical Properties of Reaction Bonded Silicon Nitride written by Matthew Brian Magida and published by . This book was released on 1981 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of the Relationship Between Processing Conditions Microstructure and Mechanical Properties of Reaction Bonded Silicon Nitride written by Hamlin Mason Jennings and published by . This book was released on 1975 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Properties of Porous High Temperature Structural Materials Sources of Toughness in Reaction Bonded Silicon Nitride written by and published by . This book was released on 1995 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reaction bonded silicon nitride (RBSN) prepared from submicron size pure silicon powder is a micro-porous ceramic with excellent mechanical and dielectric properties for high temperature structural applications and for radomes. In this research program the mechanical properties including elastic moduli, tensile strength and fracture toughness of RBSN was experimentally studied in connection with its quasi-regular microstructure. The further ranges of microstructural features and the processes related to local fracture resistance were studied by means of two relate and quite flexible computer simulations of the reaction kinetics controlling the microstructure and the processes that control the crack paths. These results are summarized and presented in greater detail in four appended manuscripts. jg p1.
Download or read book Some Properties of Reaction Bonded Silicon Nitride written by T. G. Bushell and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silicon Nitride written by Emiliano Jose Hierra and published by Nova Science Publishers. This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon nitride (Si3N4) ceramic is used in numerous applications because of its superior properties, such as high-temperature strength, good oxidation resistance and low thermal expansion coefficient. In this book, the authors present current research in the study of the synthesis, properties and applications of silicon nitride. Topics include the optical and vibration properties of silicon rich nitride; high temperature oxidation of silicon nitride based ceramics; low temperature preparation of phosphate bonded silicon nitride ceramics with high mechanical strength; the SPS-sintering process and use of ceramics for high-temperature engineering applications; synthesis and properties of silicon nitride coatings; and the use of silicon nitride as biomaterial.
Download or read book Tailoring of Mechanical Properties of Si3N4 Ceramics written by Michael J. Hoffmann and published by Springer Science & Business Media. This book was released on 2012-02-02 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Research Workshop on `Tailoring of High Temperature Properties of Si3N4 Ceramics', Schloß Ringberg/Munich, Germany, October 6--9, 1993
Download or read book Effect of Composition on the Processing and Properties of Sintered Reaction bonded Silicon Nitride written by and published by . This book was released on 1996 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The type of silicon powder and sintering additive were found to influence the processing and final mechanical properties of sintered reaction bonded silicon nitride. High purity silicon powders produced low [alpha]-Si3N4 content during nitridation. The Si powder type had no apparent effect on densification. More complete nitridation and higher room temperature mechanical properties were observed for the Si powders with higher Fe contents. However, the higher Fe contents resulted in greater high temperature strength degradation and so there was better high temperature strength retention with the higher purity Si. High [alpha]-Si3N4 contents were found after nitridation with [alpha]-Si3N4 seeded materials and with MgO-Y2O3 as the sintering additive. Densification was inhibited by refractory additives, such as Y2O3-SiO2. The highest room temperature strength and fracture toughness values correlated to high nitrided [alpha]-Si3N4 contents. The high temperature strength behavior was similar for all additive types.
Download or read book Strength Improvement in Reaction Bonded Silicon Nitride written by Robert George Stephen and published by . This book was released on 1993 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 20th Annual Conference on Composites Advanced Ceramics Materials and Structures A Volume 17 Issue 3 written by John B. Wachtman and published by John Wiley & Sons. This book was released on 2009-09-28 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is part of the Ceramic Engineering and Science Proceeding (CESP) series. This series contains a collection of papers dealing with issues in both traditional ceramics (i.e., glass, whitewares, refractories, and porcelain enamel) and advanced ceramics. Topics covered in the area of advanced ceramic include bioceramics, nanomaterials, composites, solid oxide fuel cells, mechanical properties and structural design, advanced ceramic coatings, ceramic armor, porous ceramics, and more.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
