Agency: European Commission | Branch: FP7 | Program: CP-FP | Phase: NMP.2010.1.2-4 | Award Amount: 4.04M | Year: 2010
Silver nanoparticles and silver based nanostructured composites are being frequently used in a variety of biomedical and industrial applications, such as an antimicrobial agents, lead-free solders, electric contact materials, gas-sensitive sensor, etc. The most complicated Silver using problems are related to: i) recovery of silver from ore waste materials; ii) the controlled synthesis of metal nanoparticles of well-defined size, shape and composition; iii) nanoparticles incorporation to desired implant surfaces; iv) synthesis of Silver based nanostructured composites for industrial purposes. The main goal of the Project is to develop: 1. Clean and efficient procedure of silver recovery from waste: Combined Mechanical Activation Thermal Oxidation Processing jarosite type residues to alleviate and accelerate the following precious metal leaching; 2. Combined nanotechnology of biological synthesis (use of plants for the nanoparticles synthesis) of Ag nanoparticles and its deposition on implant surfaces by electrophoretic and plasma spraying deposition; 3. Nanostructuring technology of Silver based nanocomposites manufacturing for electrical contact applications. Pilot production and trials of developed Ag nanoparticle modified implants and Ag based nanostructured composites: 1. TiO2 and Hydroxyapatite Ca10(PO4)6(OH)2) coated implants which are widely used in orthopaedic surgery because of their good biocompatibility related to the osteoconductive properties of calcium phosphate coating; 2. Ag-SnO contacts for electrical systems; these composites combine high resistance to welding and to electric arch erosion of the refractory phases with the high electric and thermal conductivities.
Agency: European Commission | Branch: FP7 | Program: CP-TP | Phase: NMP.2013.4.0-3 | Award Amount: 5.35M | Year: 2013
The vision of PilotManu is the upscale of the current mechanical alloying technological facility into a powder manufacturing pilot line by further developing existing IPR-covered results owned by the SMEs in the consortium related to mechanical alloying technology and to innovative powder materials for different applications. The baseline technology that will be upscaled from a technological facility status into pilot scale, is the High Energy Ball Milling machine, able to deliver innovative materials for new product lines developed by SMEs and industrial partnership that will lead the technological upscale. The project will demonstrate the technological and economical viability of the pilot line by implementing advanced materials into coatings, abrasive tool and additive manufacturing applications. Additional application sectors will be represented in the business cases by analyzing the cost/benefits of using the following new materials: Mg hydrides for hydrogen storage, thermoelectrics for energy harvesting, flame retardant textile and polymer nanocomposite for rapid prototyping. The potential impact brought by the new HEBM pilot production will be transversal also in all those technological sectors demanding high performance and outstanding material properties not achievable by conventional products. These huge un-exploited knowledge reservoir related to materials produced via HEBM or Mechanical Alloying will be unlocked by the Pilot Manu production system able to bring these results into the market.
Agency: European Commission | Branch: FP7 | Program: BSG-SME | Phase: SME-2013-1 | Award Amount: 1.05M | Year: 2013
Since traditional lubricants fail when friction is combined with high temperature, it is either impossible or impractical to use these materials in many industrial applications. The need for improved lubricating technologies is critical when trying to solve tribological problems concerning dry friction or boundary lubrication under high temperatures. The goal of the HIGRAPH project is to provide participating SMEs and the machinery industry with a novel technology for manufacturing sliding and rotating components that enhances dry-friction performance under high temperatures, increases durability, and extends the service lifetime of the part. It will be reached by encapsulation of High Temperature Solid-lubricant (HTSL) particles (such as WS2, WSe2, h-BN, Al-Mg-Si, BaF2, CaF2, etc.) into a micro-sized reservoirs. These reservoirs maintain the mechanical integrity of the matrix, and can slowly release the HTSL particles onto the sliding interface. As a result, both friction and wear are reduced. Friction forces and surface reactions generate a lubricious transfer film at the tribological contact, where a lubricating film with the required chemistry and structure is formed. This allows to retain the HTSL particles inside a hard, thermo- and oxidation-resistant matrix, and ensures operational integrity at extremely high temperatures. While maintaining low friction at high temperatures is important, wear resistance requires an additional blend of hardness and fracture toughness. Toughness of the developed coating will be enhanced through stress minimization, crack deflection, and ductility. The coating will be applied using powder metallurgy and sprayed coating modification methods to satisfy industrial requirements concerning coating thickness and allowable wear tolerance, which vary from 10500m.
Agency: European Commission | Branch: FP7 | Program: CP-FP | Phase: HEALTH.2013.1.3-2 | Award Amount: 7.20M | Year: 2013
Europe is confronted by a demographic challenge as a decreasing work force has to support an increasing elderly population. The economic risk implied by this burden could be addressed by efforts to achieve an increase in Healthy Life Years. One key element would be to ensure unrestricted mobility for especially the elderly, allowing them to stay at work for longer. Irreversible joint deterioration often requires a joint replacement. Implantation of artificial joints is one of the most successful orthopaedic interventions. However, an increasing number of patients receive revision surgery with these 10 % of these contract an infection and 50 % develop an adverse immune reaction (AIR) to conventional implant material. At the moment the reasons for the development of AIR are inadequately understood. Our proposal contains innovative solutions concerning this problem. A predictive approach using biomarkers will identify patients with risk to develop AIR. These patients will receive hypoallergenic endoprostheses, avoiding AIR to conventional material. Novel hypoallergenic material combinations will be developed in the frame of this consortium by material scientists and implant manufacturer. Via immunological, microbiological and biocompatibility testing the development and production process will be improved constantly. The matching of implant material with the allergenic background of patients will avoid complicated and cost-intensive reverse reactions and is a step towards personalised medicine. A further approach is to achieve a better understanding of mechanisms of AIR, and its faster and easier diagnosis using sensitive diagnostic biomarkers for an accurate differentiation from low-grade infection. Additionally, mathematical modelling of results from different methods will show us the gene regulatory network that leads to an amplification of the adverse immune response triggered by prosthetic implants and will develop predictive models of AIR process.
Grosman F.,Silesian University of Technology |
Madej L.,AGH University of Science and Technology |
Ziolkiewicz S.,Instytut Obrobki Plastycznej |
Nowak J.,AGH University of Science and Technology
Journal of Materials Processing Technology | Year: 2012
The main subject of the present work is to present the new and innovative manufacturing technology based on the incremental forming approach. The idea is to develop a deformation process that is strictly based on small incremental deformations realized by a series of thin anvils. To realise this idea in practise this idea, a proper geometry of the upper die has to be designed. In the present work it is a set of several rolls (pressure rollers) that moves down towards a series of small anvils and performs rotational movement at the same time. As a result, the pressure is not transferred by the upper die directly to the material. The pressure is transferred to the sample through the series of thin anvils. To incrementally transfer the desired final shape to the forging a series of anvils with various lengths has to be used. Due to the complexity and novelty of the proposed approach, a set of questions has to addressed. These are related to appropriate depth of anvil indentation, material flow under a single anvil, material interaction with anvils and interaction between subsequent anvils. This basic research is done in the present work with the use of simple laboratory tests. Then detailed experimental analysis of material flow in the developed new process is presented. At this stage of the research the prototype of the proposed device is created on the basis of the orbital Marciniak forging press (Marciniak, 1970). All the obtained results are presented, and conclusions related to the effectiveness of the process are highlighted. The experimental part of the research is also supported by numerical analysis. The commercial finite element (FE) Forge2005 software was used in the present work to evaluate the forging process parameters and analyze the character of material deformation. The obtained numerical results are compared with the experimental analysis performed on the developed prototype press. © 2012 Elsevier B.V. All rights reserved.
Ignatev M.,Instytut Obrobki Plastycznej |
Rybak T.,Instytut Obrobki Plastycznej |
Colonges G.,Projection Plasma Systeme |
Scharff W.,IfU Diagnostic systems GmbH |
Marke S.,IfU Diagnostic systems GmbH
Acta Metallurgica Slovaca | Year: 2013
Metallic silver, silver nanoparticles (AgNp) and nanocomposites based on silver are widely used in medicine, due to their antibacterial and antiseptic properties. The main goals of the present work were: (1) research of various types of liquids containing AgNp (including AgNp produced by biosynthesis technology using dessert plants (nopal, agave) extracts to reduce the silver); (2) research of sedimentation from liquids of AgNp on the surface of Hydroxyapatite (HA) implant coatings deposited by plasma spraying; (2) preliminary evaluation of antibacterial properties of HA coating modified with AgNp. The first test shows significant antibacterial activity of HA coatings containing AgNp produced by biosynthesis technology.
Kroczak P.,Instytut Obrobki Plastycznej |
Skalski K.,Warsaw University of Technology |
Nowakowski A.,University Medyczny Im Karola Marcinkowskiego |
Mroz A.,Instytut Obrobki Plastycznej
Archive of Mechanical Engineering | Year: 2014
The paper presents an analysis of factors influencing the accuracy of reproduction of geometry of the vertebrae and the intervertebral disc of the lumbar motion segment for the purpose of designing of an intervertebral disc endoprosthesis. In order to increase the functionality of the new type of endoprostheses by a better adjustment of their structure to the patient's anatomical features, specialist software was used allowing the processing of the projections of the diagnosed structures. Recommended minimum values of projection features were determined in order to ensure an effective processing of the scanned structures as well as other factors affecting the quality of the reproduction of 3D model geometries. Also, there were generated 3D models of the L4-L5 section. For the final development of geometric models for disc and vertebrae L4 and L5 there has been used smoothing procedure by cubic free curves with the NURBS technique. This allows accurate reproduction of the geometry for the purposes of identification of a spatial shape of the surface of the vertebrae and the vertebral disc and use of the model for designing of a new endoprosthesis, as well as conducting strength tests with the use of finite elements method. © by Paweł Kroczak 2014.
Instytut Obrobki Plastycznej | Date: 2014-11-03
A method for the manufacturing of metallic matrix composites through plastic working is disclosed. In the method, the plastic working charge is in the form of wires, tape or tapes or foil, which is the first component being covered with the second component or components with granulation less than 100 m, after which they are connected by reciprocal surface contact, forming weaved bundles, and then the connected elements which form the charge material advantageously undergo initial rolling or drawing and in all cases the principal process, which is extrusion performed on a rolling mill with circumferential grooves, where between rollers a closing matrix is placed, rotating in reverse to its axis by an angle of 20 advantageously 12, with a frequency up to 50 Hz, advantageously 15 Hz.