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Ceramic-metal composites and W-base refractory alloys for applications under severe service conditions: microstructural design and alternative processing routes

Type of activity
Competitive project
Funding entity
MIN DE ECONOMIA Y COMPETITIVIDAD
Acronym
ING4MATER
Funding entity code
MAT2015-70780-C4-3-P
Amount
142.296,00 €
Start date
2016-01-01
End date
2019-12-31
Keywords
aleaciones de w, caracterización mecànica en condiciones severas de servicio, ceramic-metal composites, colloidal processing, compuestos metal-cerámica, conformado coloidal, materiales sostenibles, mechanical characterization under severe service conditions, powder metallurgy, pulvimetalurgía, sustainable materials, w-base alloys
Abstract
This project aims to develop ceramic-metal (cermets) composites and W-base refractory alloys for applications including severe service
conditions. It will be done following two different approaches: optimization of microstructural design and implementation of processing
routes, alternative to conventional ones. Main experimental variables to consider are chemical nature and relative amount of the
constitutive phases. In the case of cermets, influence of both chemical composition of Fe-base binder (aimed to substitute reference Co)
and relative concentration of TiCN and WC particles will be studied. On the other hand, the effect of adding alloy elements (Ti, Ta, Y) and
presence of TiC as reinforcing phase will be investigated in W alloys. These materials have strategic application niches in diverse sectors,
such as energy generation (fusion nuclear reactor), mining or aerospace (machining tools, engine and blade components, etc.). Common
to all these applications is the fact that materials involved are subjected to extreme service conditions, i.e. high temperature, severe
abrasion, abrupt temperature changes, and corrosion. Moreover, in agreement with social demands for sustainability, the availability of
alternative materials that could be effectively considered as sustainable is requested. Within this context, main objectives throughout the
project are: i) to reduce environmental impact during fabrication, ii) to enhance the performance under severe service conditions, and iii) to
optimize the properties and functionality of the materials under consideration, along their (as long as possible) service lifetime. The
achievement of the proposed objectives requires a multidisciplinary approach. It is here satisfied by the expertise provided by the four
research groups involved in the proposal in different fields: chemistry (chemical synthesis, colloidal chemistry, corrosion and oxidation),
physics (mechanics and solid state phase transformation) and engineering (processing and microstructural design of materials). This will allow to join efforts for implementing environmentally clean
chemical processes as well as developing microstructural and mechanical characterization protocols, along different length scales (macro-,
micro- and nano-), to assess changes induced by exposure to severe service conditions. Hence, it may be stated that the proposed project
will transversally cross-link Materials Science and Engineering, from design of particles and/or composite granules, using different
techniques such as chemical synthesis/reduction, dispersion and surface modification, to assessment of microstructure and mechanical
integrity changes induced by high temperature exposure. In between, challenging issues such as pressing/shaping of green pieces
combining colloidal and powder metallurgy techniques, sintering, and mechanical characterization of complex microstructures under quite
distinct environmental conditions, will also be addressed. Furthermore, the project includes leading novelty issues in each corresponding
knowledge field, such as dispersion of heavy metals, additive manufacturing of mixed suspensions of non-oxide particles, compositional
and microstructural design of metallic matrices, and mechanical characterization at different dimensional scales, all together aiming to
relate properties of the developed materials with the mechanical integrity and durability of the shaped components.
Scope
Adm. Estat
Plan
Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016
Call year
2016
Funcding program
Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia
Funding subprogram
Subprograma Estatal de Generación de Conocimiento
Funding call
Excelencia: Proyectos I+D
Grant institution
Gobierno De España. Ministerio De Economía Y Competitividad, Mineco

Participants