Brunel University Research Archive (BURA) >
Special Research Institutes >
Brunel Centre for Advanced Solidification Technology (BCAST) >

Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/2685

Title: Fabrication of metal matrix composites under intensive shearing
Authors: Hari Babu, N
Tzamtzis, S
Barekar, NS
Patel, JB
Fan, Z
Keywords: Intensive Shearing; Metal Matrix Composites; Rheo-process
Publication Date: 2008
Publisher: Trans Tech Publications
Citation: Solid State Phenomena. 141-143(2008) 373-378.
Abstract: Current processing methods for metal matrix composites (MMC) often produces agglomerated reinforced particles in the ductile matrix and also form unwanted brittle secondary phases due to chemical reaction between matrix and the reinforcement. As a result they exhibit extremely low ductility. In addition to the low ductility, the current processing methods are not economical for producing engineering components. In this paper we demonstrate that these problems can be solved to a certain extent by a novel rheo-process. The key step in this process is application of sufficient shear stress on particulate clusters embedded in liquid metal to overcome the average cohesive force of the clusters. Very high shear stress can be achieved by using the specially designed twin-screw machine, developed at Brunel University, in which the liquid undergoes high shear stress and high intensity of turbulence. Experiments with Al alloys and SiC reinforcement reveal that, under high shear stress and turbulence conditions Al liquid penetrates into the clusters and disperse the individual particle within the cluster, thus leading to a uniform microstructure.
URI: http://bura.brunel.ac.uk/handle/2438/2685
Appears in Collections:Materials Engineering
Brunel Centre for Advanced Solidification Technology (BCAST)

Files in This Item:

File Description SizeFormat
Fabrication of metal matrix composites under intensive shearing.pdf1.87 MBAdobe PDFView/Open

Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.

 


Library (c) Brunel University.    Powered By: DSpace
Send us your
Feedback. Last Updated: September 14, 2010.
Managed by:
Hassan Bhuiyan