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  • 11
    Electronic Resource
    Electronic Resource
    Interfacial strength and chemistry of additive-free silicon nitride ceramics brazed with aluminium (1989)
    Springer
    Journal of materials science 24 (1989), S. 2879-2883 
    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 Two kinds of additive-free silicon nitride ceramics were brazed with aluminium; one was with as-ground faying surfaces and the other was with faying surfaces heat-treated at 1073K for 1.8 ksec in air. The heat-treatment of the silicon nitride ceramics formed a silicon oxynitride layer on the faying surfaces and increased the brazing strength of the joints. A silica-alumina non-crystalline layer and a β′-sialon layer were formed successively from the aluminium side at the interface of the joints. The heat-treatment which made the former layer thicker is a necessary process in making reliable, strong brazed joints.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02385641
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  • 12
    Electronic Resource
    Electronic Resource
    Reaction chemistry at joined interfaces between silicon nitride and aluminium (1991)
    Springer
    Journal of materials science 26 (1991), S. 4142-4149 
    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 Joined interfaces of HIPed additive-free silicon nitride ceramics/aluminium braze bonded at a low temperature of 1073 K for 18 ks or at a high temperature of 1473 K for 1.8 ks in vacuum of 1.3 mPa and of β silicon nitride powders/aluminium powders bonded at the low temperature for 1.8 ks or 18 ks in the same vacuum are identified by analytical transmission electron microscopy and X-ray diffraction method. Mullite, some small crystals and β′-sialon are detected at the interface of the ceramics/aluminium braze bonded at the low temperature and 15R AIN-polytype sialon, β′-sialon, aluminium nitride, mullite and silica-alumina noncrystalline are detected at that bonded at the high temperature. At the interface of the two kinds of powders, aluminium nitride and silicon are also detected besides β′-sialon and silica-alumina noncrystalline even though the bonding was conducted at the low temperature. The interfacial reactions of the joints are influenced not only by bonding temperature but also by the oxide formed at the interface before bonded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553501
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  • 13
    Electronic Resource
    Electronic Resource
    Characterization of the SiC and TiN whisker microstructure (1991)
    Springer
    Journal of materials science 26 (1991), S. 3202-3208 
    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 Five criteria for evaluating the whisker microstructure have been suggested, which include (1) proportion of “perfect” single crystals, (2) morphology and growth direction, (3) length, diameter and ratio ofL/D, (4) the bulk and surface chemistries, (5) defects and their distribution. Three sets of commercially available SiC whiskers made in two countries and the TiN whiskers were characterized in terms of the above criteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01124664
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    Paper (German National Licenses)
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  • 14
    Electronic Resource
    Electronic Resource
    Reaction chemistry at joined interfaces between silicon nitride and aluminium (1991)
    Springer
    Journal of materials science 26 (1991), S. 4142-4149 
    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 Joined interfaces of HIPed additive-free silicon nitride ceramics/aluminium braze bonded at a low temperature of 1073 K for 18 ks or at a high temperature of 1473 K for 1.8 ks in vacuum of 1.3 mPa and of β silicon nitride powders/aluminium powders bonded at the low temperature for 1.8 ks or 18 ks in the same vacuum are identified by analytical transmission electron microscopy and X-ray diffraction method. Mullite, some small crystals and β′-sialon are detected at the interface of the ceramics/aluminium braze bonded at the low temperature and 15R AIN-polytype sialon, β′-sialon, aluminium nitride, mullite and silica-alumina noncrystalline are detected at that bonded at the high temperature. At the interface of the two kinds of powders, aluminium nitride and silicon are also detected besides β′-sialon and silica-alumina noncrystalline even though the bonding was conducted at the low temperature. The interfacial reactions of the joints are influenced not only by bonding temperature but also by the oxide formed at the interface before bonded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02402959
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    Paper (German National Licenses)
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  • 15
    Electronic Resource
    Electronic Resource
    Joining of Al-plasma-sprayed Si3N4ceramics (1994)
    Springer
    Journal of materials science 29 (1994), S. 1436-1440 
    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 Aluminium was coated on silicon nitride ceramics by a low-pressure plasma spraying method, in order to form a tight bond between aluminium and the ceramics. Aluminium nitride formed as a interfacial reaction product between the aluminium coating layer and the ceramics. Two pieces of the aluminium-coated Si3N4 ceramics were then joined using the aluminium coating layers as filler metal in a vacuum of 1.3×10−3 Pa at 973 K. The average bending strength and Weibull modulus of the joint are 340 MPa and 6.3 respectively, considerably higher than the 230 MPa and 0.9 of a Si3N4 ceramics joint brazed with an aluminum plate under the same condition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00368906
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  • 16
    Electronic Resource
    Electronic Resource
    Characterization of the whisker–matrix interfacial reactions in K2O·6TiO2 whisker-reinforced aluminium matrix composites (1997)
    Springer
    Journal of materials science 32 (1997), S. 543-547 
    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 The interfacial reaction at the whisker–matrix interface in a K2O·6TiO2/6061Al composite was investigated by high-resolution transmission electron microscopy. Magnesium segregation and titanium enrichment at the whisker–aluminium interface was revealed by energy-dispersive X-ray analysis. It was shown that TiO and MgTi2O4 layers and MgAl2O4 particles were formed at the whisker–aluminium interfaces in the composite during the manufacturing of the composite. The thickening of the reaction layer after T6 treatment may result in the decrease of the bending strength of the composite. Specific orientation relationships between MgTi2O4 and TiO, and also between TiO and K2O·6TiO2 whiskers were also found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018502811169
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  • 17
    Electronic Resource
    Electronic Resource
    High-resolution transmission electron microscopy investigation of a stacking fault in β-Si3N4 (1997)
    Springer
    Journal of materials science 32 (1997), S. 1431-1436 
    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 High-resolution transmission electron microscopy images of stacking faults on (0 0 1) and (1 0 1) planes in a β-Si3N4 whisker were obtained and compared to image simulations. This procedure showed that the atomic structure of the four atomic planes around the (0 0 1) stacking fault plane in the β-phase is very similar to that of the unit cell of α-Si3N4 crystal. The stacking fault was observed to climb under electron irradiation in the microscope.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018541631100
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  • 18
    Electronic Resource
    Electronic Resource
    Structural characterization of ultrafine SiC powder made from laser-heated vapour-phase reactions (1992)
    Springer
    Journal of materials science 11 (1992), S. 59-62 
    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/BF00720781
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  • 19
    Electronic Resource
    Electronic Resource
    Transmission electron microscopy studies on the microstructure of a β-Si3N4/6061Al composite (1992)
    Springer
    Journal of materials science 11 (1992), S. 558-561 
    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/BF00728607
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  • 20
    Electronic Resource
    Electronic Resource
    The whisker-matrix interfacial reactions in SiC, Si3N4 and Al18B4O33 whisker-reinforced aluminium-matrix composites (1993)
    Springer
    Journal of materials science 12 (1993), S. 1644-1647 
    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/BF00627039
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