Ceramic matrix filled composite prepared by the sol-gel method

Abstract

GRAIN 1 INTRODUCTONCeramic oxide materials remain fragile even at high temperatures, do not virtually undergo plasticity changes, and are characterized by low resistance to a thermal impact.The efficient ways of increasing the strength and crack resistance of the ceramics include the decrease of its grain size along the grain boundary and rein forcement of the ceramics by crystalline particles hav ing similar grain size and composition but differing in morphology or by fibers of different oxide composi tions and whisker single crystals of refractory com pounds.Use of powders of nanosized particles obtained by the sol-gel method in the process of the formation of an alumina matrix with strengthening particles of lan thanum hexaaluminate enables one to decrease the size of the ceramic crystalline grain and substantially reduce the temperature of synthesis and ceramic com posite sintering.Abstract-A ceramic composite material consisting of a corundum matrix filled with layered microparticles of lanthanum hexaaluminate and strengthened by alumina nanofibers with the fiber surface modified by zir conia nanoparticles has been prepared. All the material components have been synthesized using the sol-gel method. The results of studies of the material microstructure by means of scanning electron microscopy (SEM) indicate the homogeneity of the component distribution in the matrix.

Surface Quality Improvement for Ultrasonic-Assisted Inner Diameter Sawing with Six-Axis Force Sensors

“…Ceramics are typically hard and brittle materials with the advantages of being lightweight and having high temperature resistance, oxidation resistance, and corrosion Ceramics are typically hard and brittle materials with the advantages of being lightweight and having high temperature resistance, oxidation resistance, and corrosion resistance. Therefore, ceramic materials are widely used in aerospace components, such as insulation tiles, turbine blades, and inner combustion engine parts [22,23]. Ceramic matrix composite materials are a key issue restricting the development of aerospace vehicle manufacturing technology in the future.…”

“…resistance. Therefore, ceramic materials are widely used in aerospace components, such as insulation tiles, turbine blades, and inner combustion engine parts [22,23]. Ceramic matrix composite materials are a key issue restricting the development of aerospace vehicle manufacturing technology in the future.…”

An Improved Normal Sawing Force Model with Spherical Abrasive Particles for Ultrasonic Assisted Inner Diameter Sawing

“…The ceramic material has the advantages of lightweight, high-temperature resistance, oxidation resistance, and corrosion resistance [1][2][3]. So ceramic materials are widely used in aerospace components, such as insulation tiles, turbines blades, and inner combustion engine parts [4,5]. Therefore, the ceramic matrix composite material is a key issue that restricts the development of aerospace vehicle manufacturing technology in the future.…”

Synthesis and Research of Alumina Ceramics Properties

“…Optimum separation conditions are mainly determined by the value of the solubility product. The precipitation method [2,3] can include additional thermal processing. Moreover, inoculating can be used for the alumina particle agglomeration process and PEG-20000 can be employed as a stabilizer [3].…”