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Método ecológico para fabricar espumas de aluminio de célula abierta en 3D con propiedades mejoradas

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TOGR20160208001
Publicado:
09/02/2016
Caducidad:
09/02/2017
Resumen:
Un departamento de ingeniería mecánica de una universidad griega especializado en investigación de materiales avanzados ha desarrollado una metodología de fabricación de aluminio y aleaciones de aluminio con estructura porosa en condiciones de presión atmosférica. Esta metodología permite obtener productos finales con una estructura y propiedades mejoradas. Otras ventajas del proceso de fabricación son la simplicidad y bajo coste, así como el uso de equipos estándar. La universidad tiene la patente europea y busca industrias de los sectores aeroespacial, naval, de la construcción y automoción con el fin de licenciar la patente.

Details

Tittle:
Environmentally-friendly method for fabricating 3-dimensional open cell aluminium foams with improved properties
Summary:
The mechanical engineering department of a Greek university, active in advanced materials research, has developed a methodology for fabrication of aluminium and aluminium alloys with porous structure under conditions of atmospheric pressure resulting in final products with improved structure and properties. The university holds a European patent and wishes to identify industries from aerospace, naval, motor or construction sectors which are interested to license this patent.
Description:
In terms of materials technology, porous materials are known as foams or sponges. Aluminium foams have a porous structure that make them excellent materials to absorb sound, shock / impact, and vibrations. Their metallic nature allows their use as electromagnetic shields and makes them stable at high temperatures. Aluminium foams are recyclable and non-contaminating, while offering a combination of physical, mechanical, thermal and acoustic characteristics typical of a homogeneous material. All these characteristics are ideal for diverse and important applications in different industrial sectors, from aerospace or naval to motor and construction.

Aluminium foams are fabricated using different methods such as liquid metallurgy and powder metallurgy, which are very complicated, resulting in porous structures with random distribution. The production methods of aluminium foams are multi-step processes with difficulty in fabricating large-sized materials. Thus there is a need for improving the manufacturing method of fabricating aluminum foams.

The metallurgy laboratory of the mechanical engineering school of this Greek university, being aware of the advantages and potential industrial applications of advanced materials, is conducting significant research work in processing and technologies of advanced materials such as production of advanced glass ceramics, development of environmentally-friendly low-temperature coatings for advanced steels protection, new alloys, improved coatings on metals etc.

The methodology presented here concerns the fabrication of open cell metal foams using organic templates of 3-dimensional geometry. The process involves the impregnation of the organic template material with slurry containing alcohol, salts and aluminium metal or alloy powder.

More specifically the invention aims at the improvement of the fabrication method of aluminum (AL) and its alloys with porous structures under conditions of atmospheric pressure, resulting in final products with improved structures and properties. The fabrication method involves a selection of the appropriate organic template foams (e.g. polyurethane with specific cell size and 3-dimensional geometry) and the preparation of a slurry containing AL powder, salts (e.g.: AlCl3) and organic materials such as alcohol, ethanol, methanol etc. Impregnation of the organic template foam is performed, with the slurry drying at room temperature for 24 hours, followed by heating between 215o - 500oC for 3.5 hours and using an inert (Ar2 or N2) atmosphere so as to limit the formation of oxides. The material is then cooled to room temperature and the final stage involves sintering the metal foam structure within a temperature range of 500 - 525oC.

The university is looking for industries in the sector of aerospace, naval, motor or construction which are interested in licensing this patent.
Advantages and Innovations:
The advantage of this porous materials fabrication method is its simplicity and low cost as it is performed under atmospheric conditions and using standard readily-available equipment. In addition, it is environmentally-friendly. Furthermore, the geometry of the foam produced is known, thus the properties of the materials can be easily pre-defined.

The conventional methodology used for the production of porous materials, including liquid metallurgy and powder metallurgy, are very complicated, resulting in porous structures with random distribution. These structures are a result of substances that are added into the mixture and decompose when thermally treated, or are produced by direct introduction of inert gas bubbles into the liquid metal before solidification.
Stage of Development:
Prototype available for demonstration
IPs:
Patents granted

Partner sought

Type and Role of Partner Sought:
Type: industry

Activity: aerospace, naval, motor or construction sectors

Task to be performed: license the patent and produce the material for specific applications

Client

Type and Size of Client:
University
Already Engaged in Trans-National Cooperation:
Si
Languages Spoken:
English
Greek

Keywords

Technology Keywords:
02007005 Composite materials
02007010 Metals and Alloys