منابع مشابه
Machinable α-SiAlON/BN Composites
Dense machinable α-SiAlON/BN composites were fabricated by hot-pressing using turbostratic boron nitride (tBN) obtained from nitridation of melamine diborate. The tBN was added to the starting powders, or introduced as a coating that formed in situ on α-Si3N4 carrier powders during nitridation, and was subsequently converted to hexagonal boron nitride (hBN) during hot pressing by solution repre...
متن کاملRecycling of Coal Fly Ash for the Fabrication of Porous Mullite/Alumina Composites
Coal fly ash with the addition of Al₂O₃ was recycled to produce mullite/alumina composites and the camphene-based freeze casting technique was processed to develop a controlled porous structure with improved mechanical strength. Many rod-shaped mullite crystals, formed by the mullitization of coal fly ash in the presence of enough silicate, melt. After sintering at 1300-1500 °C with the initial...
متن کاملFabrication and properties of composites of
Carbon nanotubes (CNTs) [1, 2] have dimensions similar to those of typical polymeric chains, with 1-50nm in diameter and 1-10µm in length. Experimental results on individual carbon nanotubes and nanotube bundles show that they have exceptional electrical and mechanical properties with an elastic modulus of ~1TPa and fracture strain of 5-10%. [3] The thermal conductivity of the nanotubes is expe...
متن کاملIn vivo response of novel calcium phosphate-mullite composites: results up to 12 weeks of implantation.
In this paper, the in vivo response, in particular, the histocompatibility of newly developed CaP-mullite composites is reported. In the present experiments, the bioceramic implants were inserted in the long bones of healthy rabbits according to standard protocols (ISO-10993) and the tissue response was studied at different time intervals of up to 12 weeks. Ultra high-molecular weight polyethyl...
متن کاملNanocomposite mullite/mullite powders by spray pyrolysis
A mullite/mullite nanocomposite powder has been synthesized, composed of nanometer-size 3Al2O3 · 2SiO2 (‘3 : 2’) mullite precipitates within a matrix of the high alumina 2Al2O3 · SiO2 (‘2 : 1’) mullite. Historically, the transition from the metastable high-alumina phase to the thermodynamically stable ‘3 : 2’ phase of mullite has been thought to be a continuous process, involving a continuous s...
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ژورنال
عنوان ژورنال: Journal of the Japan Society of Powder and Powder Metallurgy
سال: 1990
ISSN: 0532-8799,1880-9014
DOI: 10.2497/jjspm.37.362