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This monograph discusses in detail the compacting conditions and the resultant structure and properties of metals, composites and ceramics. It covers the basic aspects of science and technology of explosive compaction. Comprise chapters on Shock Waves in Matter, Technology of Explosive Compaction, Explosive Compaction of Metallic Powders, Explosive
This is the final project report on a study to determine the feasibility of explosively compacting powdered metals to form missile and other ordnance parts. At the outset of this project, it was believed that with the ability to generate extremely high pressure with explosives, one could achieve close to 100% theoretical density by using explosives to compact metal powders. During the course of the project, densities as high as 97.9% of theoretical were attained with powdered steel compacts. However, considerable precompaction preparation was necessary to achieve this. The most difficult problem encountered was driving off oxides in the steel powder. This was never satisfactorily accomplished even with preheating the powder samples in a vacuum prior to compaction. Sintering in a reducing atmosphere was also tried without success. It became more evident as the project progressed that the cost of achieving acceptable physical properties would be very high and make explosively compacting parts infeasible.
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.
Warm compaction is a cost saving and effective method for obtaining high performance powder metallurgy (PM) parts. This chapter presents the principles of warm compaction and technical aspects of the process. The green and sintered properties of warm compacted parts are discussed and compared with conventionally (cold) produced compacts. The applications of the process for ferrous and non-ferrous PM parts are presented and future trends are outlined.
It is concluded that explosive compaction of metal powders will not be afeasible process, unless a number of problems are solved. These problemsinclude a lack of bonding between the particles, the tendency for crackingand the presence of high levels of residual stresses in the sample.