Joining Ultra-Dispersed Materials
Methods of Joining Metallic Ultra-Dispersed Materials
Tech Area / Field
- MAT-ALL/High Performance Metals and Alloys/Materials
- MAT-SYN/Materials Synthesis and Processing/Materials
3 Approved without Funding
NIKIMT (Institute of Assembly Technology), Russia, Moscow
- MIFI, Russia, Moscow
- Royal Institute of Technology / Department of Materials Science and Engineering, Sweden, Stockholm\nUniversity of New Orleans, USA, LA, New Orleans\nUniversidade da Coruña / Escola Politécnica Superior, Spain, Ferrol
Project summaryOpened in last of 20th century significant prospects in ultra-disperse crystals and ultra-disperse structured materials applications, as well as in their physical, chemical, mechanical and biological properties, allowed to come from researches to practical applications. Due to their unusual and unique properties, the ultra-dispersed materials became marketing significance recent years. The main areas, where the ultra-dispersed materials are in demand are: electronics, optic-electronic and magnet products, bio-medicine, pharmacology, cosmetics and also, production of catalysts and sorbs.
At present time, comprehensive researches revealed, that there is possibility to obtain very different ultra-dispersed conditioned materials: pure metals, inter-metallic joints, oxides, etc. Further development of ultra-dispersed technologies depends mostly on great difficulties in storage and use of metal- and others single-component ultra-dispersed materials. In operational conditions the ultra-dispersed materials must have a tight contact to different materials: macro-, micro- and ultra-dispersed materials. Because of this, in order to increase capability of their application in modern engineering and industry, to create ultra-dispersed material structures and to increase contact conductivity, it is necessary to obtain a fast joint.
Thermal activation leads to intensification of diffusion and re-crystallization processes, and to partial or full annihilation of ultra-dispersed crystalline structure, to disappearance of unbalanced phases, to relaxation of residual stresses and to relevant changes of their unique properties. Because of this, it is not possible to joint the ultra-dispersed materials by mean of fusion welding.
The attempt to joint ultra-dispersed materials by cold welding was made by Russian researches, however it did not lead to any industrial application.
The present Project is intended for study of possibility to obtain fast joint of metal ultra-dispersed materials, for development of solid-phase processes for joining ultra-dispersed materials with different metals and alloys preventing ultra-dispersed crystalline structural annihilation or loss of their unique physical-mechanical and magnet-electric properties.
For the Project realization it is necessary to perform wide research of metal ultra-dispersed materials joints obtained by mean of explosive welding, electron-beam welding, brazing, cold- and resistance welding. For study of joint's transitional area it is necessary to perform Roentgen- and structural analysis of this zone, qualification of ultra-dispersed crystals with use of modern methods of optical-tunnel- and atomic-force microscopy, as well as method of photon-correlation spectroscopy. Besides that, for wide industrial application of methods for ultra-dispersed materials joining, it is necessary to develop quality inspection methods for these materials' transitional areas. The research results will allow to choose more rational methods of joining ultra-dispersed materials both each to other and with others metals and alloys.
The Project's results will give significant promotion in industrial application of metal ultra-dispersed materials for manufacture of products and structures made of them, and also to wide their application area in electric engineering, electronics, automobile and instrument industries.