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Multicomponent Synergetic Shells

#3989


Multicomponent Synergetic Shells of Refractory Interstitial Phases with Substructural Metal Sublayer for Double Protection and Safety Enhancement of Industrial Materials Application under Ionizing Radiation Effect

Tech Area / Field

  • MAT-SYN/Materials Synthesis and Processing/Materials
  • FIR-MAT/Materials/Fission Reactors
  • MAN-TRI/Tribology/Manufacturing Technology
  • MAT-ALL/High Performance Metals and Alloys/Materials

Status
3 Approved without Funding

Registration date
10.09.2009

Leading Institute
VNIITF, Russia, Chelyabinsk reg., Snezhinsk

Supporting institutes

  • MIFI, Russia, Moscow

Collaborators

  • CEA / LIST, France, Gif-sur-Yvette Cedex\nFlorida International University, USA, FL, Miami\nUniversity of Oklahoma / Health Sciences Center, USA, OK, Oklahoma City

Project summary

Application of modern energy-intensive technologies in many fields of science and engineering is often related to permanent various ionization radiation effect on industrial materials, including space radiation, atmospheric precipitations, small doses of industrial radiants and processed materials.

We should note nickel alloys, steels and ceramics of various applications used as shells for aerospace craft, transport containers, protective shields, pipelines, machining tool, sorption devices, fuel cells and other products among the materials of new techniques more often used under effect of ionizing radiation.

Use of the materials under the effect of ionizing radiation (α - and other corpuscular particles) refers to different extreme states as it is accompanied by origination of the surface high-temperature spikes, forming development, crack formation, helium porosity, hydrogen brittleness and other failures in them resulting in mechanical degradation and premature failure of the material.

The modification of material mechanical characteristics is also accompanied by degradation of their functional properties (corrosion resistance, strength, durability, sorption capacity and others), that as a whole reduces safety of their application and enables emergency situations during operation. The indicated processes proceed more intensively in the surface layers of the materials, directly affected by radiations.

Problem of release of ionizing radiation effect and protection of industrial materials for safety enhancement of their application in such conditions is still unresolved as the known techniques for materials doping have significant limitation degrees and very often cannot provide the required set of properties.

The work is aimed at integrated development of scientific approach on production of the new structural forms of material surfaces, specifically multicomponent synergetic shells with substructural metal sublayer.

This solution will ensure the enhanced safety during product maintenance under effect of ionizing radiation, due to their decrease and simultaneous increase of mechanical and functional properties of the materials. This solution is the most important for the materials used in aerospace complex, atomic energetics, ore mining industry and other related production fields.

Multicomponent shells will be synthesized on the basis of refractory interstitial phases, and their synergetic properties (protective and high functional properties) are ensured by a special composition and structure.

The substructural sublayer will be formed in the surface layers of industrial material in the form of close-packed random microcrystalline intermetallic compounds that will give it the properties of the materials, referring to the state of alloys falling with special functional properties.

The sublayer material will allow implementation protective function concerning ionizing radiation and will ensure high mechanical characteristics of the material surface in the conditions of thermal spikes development.

The new structural forms of the industrial materials surface will ensure double protection against radiation effect, and also high mechanical and functional properties that as a whole will enhance maintenance safety and will extend field of their application.

The project refers to the applied researches.

The project goal is protection and enhancement of safety of the modern industrial materials application under effect of different ionizing radiation, and also extension of their application fields.

The set goal is attained by the development of the new structural forms of the working surface of the industrial materials including multicomponent synergetic shells with substructural sublayer.

For the development of the new structural forms of the surface in the project physicochemical aspects of ion-plasma technologies are developed using shock-dynamic effect on the surface of ion beams of refractory metals with energy of 0.2-2.0 keV.

Principal directions of the studies in the project are:

  1. Development and studying of new structural forms of the materials as multicomponent synergetic shells with substructural metal sublayer for double protection and safety enhancement at maintenance of existing industrial alloys under effect of different types of ionizing radiation (α - and other corpuscular particles).
  2. The development of the software package for modeling of interaction of the refractory metals ions with nickel, iron and alumina at beam energy of 0.2-2.0 keV, selection of ion beams metals;
  3. Physical and chemical study of interaction of refractory metals ions with nickel, iron in binary systems nickel - refractory metal-ion, iron - refractory metal-ion, and also in triple systems nickel (iron) - alloying metal - refractory metal-ions. Development of the models of substructural metal sublayer in nickel and iron, study of the structure and phase composition.
  4. Synthesis of modeling synergetic shells of the refractory interstitial phases possessing synergetic properties for nickel (iron) and their alloys, study of the structure and properties.
  5. The development of the software package for modeling of interaction of ionizing radiation (α - β - and other corpuscular particles) with the material of the sublayer and shells. Calculation of heart release in the material of the sublayer and synergetic shells of the modeling compositions made for nickel and iron. Selection of optimum compositions.
  6. Development of the techniques and study of the protective and physical-mechanical properties of the substructural sublayer developed for nickel and iron, within the temperature range of 500-10000С, determination of optimum compositions for each radiation type.
  7. Study of protective and functional properties of nickel and iron with modeling synergetic shells (durability, sorption capacity, corrosion resistance in liquid-metal and other media) under effect of ionizing radiation. Comparative analysis with initial properties of metals, choice of optimum compositions of the shells.
  8. Development of theoretical aspects of the main directions of synthesis of multicomponent synergetic shells with substructural sublayers for nickel-based industrial alloys (similar to Ni-Cr alloy) and iron (structural steel alloyed by the refractory elements).
  9. Study and evaluation of the possibility of application of the new structural forms for other materials (ceramics of alumina type).

The basic originality of the solutions offered in the project consists in the development of multifunctional structural forms of the material surface (synergetic shells with substructural sublayer), ensuring double protection against radiation, and also high complex of mechanical and functional properties that allows to transform the existing materials into the category of alloys with special functional properties.

The further development of the project will be aimed at implementation of the developed models of synergetic shells with substructural sublayer into techniques and processing technologies of their formation for the existing industrial alloys on the basis of nickel and iron.

Results of the project meet the modern requirements imposed to industrial materials, allow to use them in new conditions and extend application area.

They are of great interest for improvement of the surface characteristics of the materials of aerospace complex, energetics, ore mining industry and other related production fields.

Problems solved in the project are also of practical interest for scientific canters of the USA, Japan and Europe, having similar thematic and industrial problems. Therefore cooperation of scientists will be useful both during project implementation, and at the subsequent stages of the results application.

Participants of the project have positive results, experience of work and inventions in the field of materials technology and surface layers study, tests, physics of protection, physical and chemical analysis and in other related fields on which basis the requirements to the modern materials were formulated and ways of their solution within project tasks were shown.


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