In this book, improvements in the heat resistance of silicon nitride (Si 3 N 4 ) ceramics using grain boundary control and in plasticity at high temperatures using grain size control in order to reduce the cost of shaping Si 3 N 4 are described.

The heat resistance of Si 3 N 4 is improved by mixing a slight amount of sintering additive as an impurity into the original material powder. The author presents his findings on the high heat resistance of Si 3 N 4 .

The author also develops a new fabrication method for Si 3 N 4 nano-ceramics that produces high plastic formability. The method developed offers two improved points in grinding and sintering processes. The author found that the plastic formability of Si 3 N 4 nanoceramics is dependent on load stress; the results of his research are detailed in this book.

Describes the fabrication process of heat-resistant and plastic-formable silicon nitride Explains in detail the results of both the creep test and instant break test to provide a conceptual view of material design Sets forth a new fabrication method for Si3N4 nanoceramics that produces high plastic formability Includes supplementary material: sn.pub/extras

Autorentext

Dr. Nishimura Toshiyuki Chief Researcher, Sialon Group, Sialon Unit, Environment and Energy Materials Division, National Institute for Materials Science Email: Nishimura@Toshiyukinims.go.jp Phone: +81-29-860-4488 1-1 Namiki, Tsukuba, Ibaraki, 305-0044 JAPAN

Inhalt

Introduction: Deformation of Silicon Nitride at High Temperatures.- Preparation of nanosize silicon-nitride-based ceramics and their superplasticity.- Grain Boundary Control to Obtain Heat-Resistant Silicon Nitride.- Conclusions.