This volume, SCIENCE OF SINTERING: NEW DIRECTIONS FOR MATERIALS PROCESSING AND MICROSTRUCTURAL CONTROL, contains the edited Proceedings of the Seventh World Round Table Conference on Sintering, held in Herceg-Novi, Yugoslavia, Aug. 28 - Sept. 1, 1989. It was organized by the International Institute for the Science of Sintering (IISS), headquartered in Belgrade, Yugoslavia. Every fourth year since 1969, the Institute has organized such a Round Table Conference on Sintering; each has taken place at some selected location within Yugoslavia. A separate series of IISS Topical Sintering Symposia (Summer Schools) have also been held at four year intervals, but they have been offset by about two years, so they occur between the main Conferences. As a rule, the Topical Sintering Symposia have been devoted to more specific topics and they also take place in different countries. The aim of these Conferences and their related "Summer Schools" has been to bring together scientists from all over the world who work in various fields of science and technology concerned with sintering and sintered materials. A total of seven IISS Conferences have been held over the period 1969-1989, and they have been supplemented by the four Topical Sintering Symposia held in Yugoslavia, Poland, India and Japan (in 1975, 1979, 1983 and 1987, respectively). This most recent five day Conference addressed the fundamental scientific background as well as the technological state-of-the-art pertinent to science of sintering and high technology sintered materials.
I. Fundamentals of Sintering.- Sintering of Ceramics.- The Main Trends in Study and Quantitative Description of the Sintering Processes.- Stereological Theory of Sintering.- A Stereology-Based Equation for Isotropic Shrinkage During Sintering by Viscous Flow.- A New Model for Initial Sintering of Oxide Powders under Controlled Gaseous Atmosphere.- Mechanism of Anisotropic Dimensional Changes During Sintering of Metal Powder Compact.- II. Controlled Preparation of Ceramic Powders.- Preparation of Well Defined Ceramic Powders.- Progress in Preparation of ZnO Based Varistor Ceramics.- Chemical Preparation of Alumina-Zirconia Powders for Low Temperature Sintering and Particulate Composites.- Evolution of Mullite from a Solgel Precursor.- The Role of Powder Calcination Conditions in the Sintering Behaviour of Calcined ZrO2 Powders.- Surface Effect of MgO Addition on Gamma Al2O3 Sintering.- III. Preparation and Sintering of Metallic Powders.- Principles of Atomization.- Dispersion Hardening of a Rapidly Solidified Copper Based Matrix.- Problem of Sintering Metallic Ultrafine Powders.- Sintering of Copper Ultrafine Powders.- Synthesis and Characterization of the Mixed and the Composite Ni-TiN Ultrafine Particles.- IV. Sintering of Multiphase Systems.- Phase Stability and Sintering of Multiphase Alloy Systems.- Solid State Sintering of Two Component Systems with Solubility.- Prognosis of Sintering of System W-Ni in the Presence of Liquid Phase.- Influence of Sintering and Termomechanical Treatment on Microstructure and Properties of W-Ni-Fe Alloys.- Removal of Ni-Activator from the Activated Sintered W-Compact by High Vacuum Treatment.- V. Pressure Sintering.- Explosive Compaction of Powders: Principle and Prospects.- Theoretical Aspects of High Pressure Sintering.- Dynamic Compaction of Amorphous Ni78P22.- The Prediction of HIP Parameters for Intermetallic Prealloyed Ni-Al Powder.- Defect Healing Mechanisms During Sinter/HIP of Polyphase Materials.- Residual Stress Characteristics of Ceramic Coatings and Their Cracking Behaviour.- VI. Rate Controlled Sintering.- Rate Controlled Sintering for Ceramics and Selected Powder Metals.- Application of Rate Controlled Sintering in the Production of ZrO2-Based Ceramic Materials.- Rate-Controlled Sintering of SiC with Additions of (a) Al2O3 + Y2O3; (b) B + C; (c) B4C + C.- VII. Microstructure Control.- Grain Boundaries in Sintering.- Computer Simulation and Experimental Analysis of Abnormal Grain Growth in BaTiO3 Ceramics.- Pore Removal During Final Stage Sintering of Modified Yttria.- Thermoelectric Properties of Lead Tin Telluride Compacts.- Microstructural Development in Dense Si3N4 Ceramics.- Effect of Sintering Parameters on Microstructure and Properties of Sialon Materials.- VIII. Metals and Composite Processing.- Powder Processing of High Temperature Aluminide-Matrix Composites.- Differential Sintering.- Boron/Magnesium-Aluminium Machinable Composite.- Effect of "Inheritance" in Powder Metallurgy.- Hydrostatic Compaction of Fine Cobalt Powder.- Mechanical Properties of Cu-P Sintered Alloyed Steels: Study of the Copper Influence on Dimensional Changes.- IX. Sintering of Oxide Ceramics.- Ultra-Rapid Sintering of Ceramics.- Hydrothermal ZrO2 Powder and Its Sintering Behaviour.- Effect of Green Compact Pore Size Distribution on the Sintering of ?-Fe2O3.- Effect of Niobia on the Sintering of SnO2.- Kinetics and Mechanisms of Solid State Sintering of Alkaline Earth Titanates.- The Influence of Thermal Treatment on Polarization Behaviour of Bi4Ti3O12 Ceramics.- Changes of Electrical and Structural Characteristics of Cold Sintered Potassium Dihydrogen Arsenate with Temperature.- A Study of Isothermal Sintering and Properties of Magnesium Oxide from Sea Water.- X. High Temperature Superconductors.- Properties of High Tc Superconducting Oxides.- The Influence of Oxygen Stoichiometry on High-Tc YBa2Cu3Oy Superconductor Properties.- A Modified Noncontact Method for Critical Temperature Measurements of High Temperature Superconductors.- XI. Non-Oxide Ceramics.- On the Kinetics of Densification During Liquid Phase Sintering of Si3N4.- Stability of Pure and AlN-Alloyed Al2OC and Influence on Abrasive Properties of Al2O3-Al4C3-AlN Materials.- Preparation and Properties of ?/? Sialon Composites.- International Program Committee.- Contributors.