Fabrication of composite pipes by multi-billet extrusion technique

Optimization of the rheology and sintering behavior of electrolyte and anode pastes to be used in co-extrusion of solid oxide fuel cells

“…One remedy for such a problem would be using of functionally graded materials which has been suggested previously in co-extrusion of multilayered self supported SOFC. [8][9][10][11][12] However, co-extrusion requires fine tuning and unification of different pastes in order to fabricate intact tube and use of continuous extrusion. 13 Unification relies on rheological characterization of the pastes.…”

Nanostructure, Texture Evolution and Mechanical Properties of Aluminum Alloys Processed by Severe Plastic Deformation

“…Schematic illustration of the spin-bonding (Mohebbi & Akbarzadeh, 2010a) In many cases, the inner and outer surfaces of hollow sections are exposed to different environments, and different characteristics are required inside and outside. In these cases, various bimetallic or clad tubes of stainless steels or high-alloy steels and super alloys clad onto carbon or low alloy steels, are utilized in boilers, heat exchangers, nuclear power plants and petroleum and chemical industries (Chen et al, 2003). So far, several methods have been used to produce composite tubes and cylinders.…”

“…So far, several methods have been used to produce composite tubes and cylinders. While centrifugal casting (Sponseller et al, 1998) and extrusion (Chen et al, 2003) can be used to fabricate the thick-walled bimetallic tubes, explosive bonding (Berski et al, 2006), ball attrition (Zhan et al, 2006), thermohydraulic fit method and hydraulic expansion method (Wang et al, 2005) are capable of manufacturing thin-walled cylinders. The most widely used cladding process is rollwww.intechopen.com Nanostructure, Texture Evolution and Mechanical Properties of Aluminum Alloys Processed by Severe Plastic Deformation 429 bonding of two or more sandwich sheets (Zhan et al, 2006).…”

Co-extrusion of multilayered ceramic micro-tubes for use as solid oxide fuel cells

“…This, therefore, requires the formulation of a number of pastes containing powders with differing particle sizes, size distributions, morphologies and surface chemistries, as well as pore size, distribution and shape. Previous work by Liang and Blackburn, 4,5 Zhang et al, 6 Chen et al 7 and others has looked at the co-extrusion of multilayered tubes. These tubes were relatively large, with layer thicknesses being in the order of 1 mm, a limitation which the authors believe could be overcome by a change in design of the co-extrusion process and equipment.…”