Production and mechanical properties of Al2O3 particle-reinforced 2024 aluminium alloy composites

We present a bibliography on moving and free boundary problems for the heatdiffusion equation, particularly regarding the Stefan and related problems. It contains 5869 titles referring to 588 scientific Journals, 122 books, 88 symposia (having at least 3 contributions on the subject), 30 collections, 59 thesis and 247 technical reports. It tries to give a comprehensive account of the western existing mathematicalphysical-engineering literature on this research field. RESUMEN Se presenta una bibliografía sobre problemas de frontera móvil y libre para la ecuación del calor-difusión, en particular sobre el problema de Stefan y problemas relacionados. Contiene 5869 títulos distribuidos en 588 revistas científicas, 122 libros, 88 simposios (teniendo al menos 3 contribuciones en el tema), 30 colecciones, 59 tesis y 247 informes técnicos o prepublicaciones. Se da un informe amplio de la bibliografía matemática, física y de las ingenierías existente en occidente sobre este tema de investigación. Primary Mathematics Subject Classification Number (*): 35R35, 80A22 Secondary Mathematics Subject Classification Number (*): 35B40, 35C05, 35C15, 35Kxx, 35R30, 46N20, 49J20, 65Mxx, 65Nxx, 76R50, 76S05, 76T05, 93C20. (*) Following the 1991 Mathematics Subject Classification compiled by Mathematical Reviews and Zentralblatt fur Mathematik. Primary key words: Enthalpy formulation or method, Filtration, Free boundary problems, Freezing, Melting, Moving boundary problems, Mushy region, Phase-change problem, Solidification, Stefan problem. Secondary key words: Continuous mechanics, Diffusion process, Functional analysis, Heat conduction, Mathematical methods, Numerical methods, Partial differential equations, Variational inequalities, Weak solutions. Palabras claves primarias: Método o formulación en entalpía, Filtración, Problemas de frontera libre, Congelación, Derretimiento, Problemas de frontera móvil, Región pastosa, Problema de cambio de fase, Solidificación, Problema de Stefan. Palabras claves secundarias: Mecánica del continuo, Procesos difusivos, Análisis funcional, Conducción del calor, Métodos matemáticos, Métodos numéricos, Ecuaciones diferenciales a derivadas parciales, Inecuaciones variacionales, Soluciones débiles. El manuscrito fue recibido y aceptado en octubre de 1999. D.A. Tarzia, A bibliography on FBP. The Stefan problem, MAT Serie A, # 2 (2000). 3

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A bibliography on moving-free boundary problems for the heat-diffusion equation. The stefan and related problems

Young’s modulus estimation based on high symmetry 3-D finite element model for metal matrix composites

In-situ Al-based bulk nanocomposites by solid-state aluminothermic reaction in Al–Ti–O system

Metal matrix composites: History, status, factors and future

Cast-aluminium-1.5–7 wt% yttrium alloy wires were produced by the heated mould (Ohno Continuous Casting) process with a typical casting speed of 1.1 m min-1. Using a 2 mm diameter channel bore and positioning the solidification front outside the mould, it was possible to cast wires of 1.6–1.9 mm diameter with uniform chemical composition along the length of the wire. Cast wires contained directionally solidified cells or dendrites of α-aluminium with metastable Al4Y and β-Al3Y phases in intercellular or interdendritic regions. At higher casting speeds (>1.1 m min-1), the predominant metastable phase was found to be Al4Y.

Development of net-shape cast aluminium-yttrium alloy wires and their solidification structures

The feasibility of applying the Ohno continuous casting (OCC) process for fabricating net-shape MMC welding rods and wires has been examined using Al-Si and Al-Cu-Si alloys containing 8–11 vol% SiC particles. It was confirmed that MMC rods 4 mm in diameter and wires 2 mm in diameter could in fact be produced by the OCC process. For both rods and wires, it was found that the distribution of SiC particles was relatively uniform. It was also found that an angle-entry channel must be used to avoid clogging of the channel inlet. Furthermore, faster casting speeds assisted particle incorporation into the wire. Casting speeds employed were between 0.2 and 1.1 m min −1 .

SiC particulate-reinforced, aluminium-matrix composite rods and wires produced by a new continuous casting route

The horizontal Ohno continuous casting (OCC) process has been used to examine the possibility of casting net-shape metal matrix composite (MMC) wires, ∼2 mm in diameter. The foundry alloy, Al-7%Si-0.4%Mg (A356) containing ∼ 11 vol.%SiC particles was used for this study. It was confirmed for the first time that net-shape MMC wires with relatively uniform particle distribution could in fact be produced by the OCC process. At lower casting speeds (0.15-0.2 m min−1), an external force, induced by impeller stirring in the mould cavity, was necessary in order to assist particle flow into the narrow mould channel and thus ensure incorporation of particles within the wires. At higher casting speeds of about 1 m min−1, particles were incorporated without external force. It was observed that the distribution of particles within the matrix was independent of the refinement of the microstructure when the dendrite arm spacing was smaller than the particle size.

A new method for continuous casting of particulate reinforced metal matrix composite wires

Hierarchical porous silicon carbide (SiC) structures with total porosity in a wide range of 37.82 %− 94.34 % were achieved by combining robocasting and alkali-induced starch gelatinization technique. (i) 50 µm-2 mm sized pores, with porosities of 22.33 %− 82.13 %, were created by robocasting. (ii) 1–140 µm pores, with porosities of 20.20 %− 68.21 %, were induced by the starch template. Additionally, we firstly introduced an alkali-induced starch gelatinization technique to the gel inks for robocasting, which promoted its elastic properties (storage modulus and shear yield stress) and prolonged its preservation time to 3–7 days. The gelatinized starch granules were also used as binder, which facilitated high-velocity (3–20 mm/s) extrusion of the inks through fine (150–800 µm) nozzles. The porous SiC structures with two scales of porosity are promising for wide applications such as porous burners, liquid and gas filters, catalyst supports and so on. 

Q. Xia

Papers

Development of net-shape cast aluminium-yttrium alloy wires and their solidification structures

SiC particulate-reinforced, aluminium-matrix composite rods and wires produced by a new continuous casting route

A new method for continuous casting of particulate reinforced metal matrix composite wires

Combining robocasting and alkali-induced starch gelatinization technique for fabricating hierarchical porous SiC structures

Adsorption effects of polyethylene imine on the rheological properties for robocasting