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  • 1
    Electronic Resource
    Electronic Resource
    The effect of particulate loading on the mechanical behaviour of Al2O3/Al metal-matrix composites (1993)
    Springer
    Journal of materials science 28 (1993), S. 6683-6690 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An investigation was made to determine the effect of particulate loading on the elastic, tensile, compressive and fracture properties of Al2O3/Al metal-matrix composites fabricated by a pressureless-liquid-metal-infiltration process. The elastic modulus was found to be strongly affected by the reinforcement content, falling within the Hashin-Shtrikman bounds. The Young's modulus of the most highly loaded composite was 170 GPa; compare with 65 GPa for the unreinforced alloy. The strength systematically increased with loading, and the rate of increase also increased with loading. The measured yield strengths were nominally the same in both tension and compression; however, the composites possessed far greater ultimate strengths and strains-to-failure in compression than in tension. At 52 vol % reinforcement, yield strengths in tension and compression of 491 and 440 MPa, respectively, were measured, whereas the associated ultimate strengths were 531 and 1035 MPa, respectively. In tension, the yield and ultimate strengths of the base alloy were found to be 170 and 268 MPa, respectively. The composites displayed a nearly constant fracture toughness for all particulate loadings, with values approaching 20 MPa m1/2 compared to a value of 29 MPa m1/2 for the base alloy. Using fractography, the tensile-failure mechanism was characterized as transgranular fracture of the Al2O3 particles followed by ductile rupture of the Al-alloy matrix, with no debonding at the matrix/reinforcement interfaces.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00356415
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Microstructure and properties of AIN matrix composites produced by the directed nitridation of molten aluminum (1994)
    Springer
    Journal of materials science 13 (1994), S. 293-296 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00571781
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Properties and microstructures of Lanxide® Al2O3-Al ceramic composite materials (1989)
    Springer
    Journal of materials science 24 (1989), S. 658-670 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A study has been made of four Al2O3-Al composite materials fabricated by the directed oxidation of molten aluminium alloys. Their microstructures are described and measurements of density, coefficient of thermal expansion, thermal conductivity, hardness, elastic constants, compressive strength, flexural strength, fracture toughness, work of fracture, and thermal shock resistance are reported. Compared to a typical dense sintered Al2O3, such as Durafrax® 1542, which is somewhat harder, stiffer, and stronger in compression, the new composites can be stronger in flexure, particularly at high temperatures, far tougher, and considerably more resistant to thermal shock. Attempts are made to relate their differences in properties to microstructure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01107457
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The fabrication of metal matrix composites by a pressureless infiltration technique (1991)
    Springer
    Journal of materials science 26 (1991), S. 447-454 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A novel technique for fabricating metal matrix composites by the spontaneous (pressureless) infiltration of filler preforms with molten aluminium alloys is described. Numerous reinforcing materials, including Al2O3 and SiC of various configurations, such as particles, agglomerates, and fibres, have been incorporated as fillers. The effects of processing variables, such as alloy chemistry, process temperature, and filler material, on the infiltration kinetics and resultant microstructures are discussed. Comparisons with existing infiltration technology and preliminary composite properties are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00576541
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    A natural wear resistant material (1986)
    Springer
    Journal of materials science 21 (1986), S. 2819-2824 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A study has been made of Danto Koruntz (Danto International Ltd.), a natural material now beginning to find use in wear applications. Its microstructure is described and its density, coefficient of thermal expansion, thermal conductivity, hardness, elastic constants, flexural strength, fracture toughness and work of fracture are reported. Compared to a typical man-made 95% dense sintered wear alumina, which is somewhat harder and tougher and considerably stronger and stiffer, Danto Koruntz is much less erosion resistant and exhibits qualitatively different thermal shock behaviour. When slid on itself, Danto Koruntz exhibits a slightly lower coefficient of friction than does the alumina.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00551495
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    Paper (German National Licenses)
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