Results 181 to 190 of about 19,814 (230)
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Interfacial Chemistry of Mullite-Mullite Composites
2008Interfacial chemistry of mullite fiber reinforced-mullite matrix composites was examined using SEM/EDX and scanning AES. All the fibers bond strongly to the matrix and exhibit no sliding during afiber push-in test. Excess Si over AI is found at the fiber-matrix interfaces. AES results show the carbon -layer is nonuniform and in some cases less than 30
Ori Yeheskel +2 more
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Diffusion bonding of ceramics: mullite, ZrO2-toughened mullite
Journal of Materials Science, 1991Diffusion bonding of fine-grained mullite and ZrO2-toughened mullite was performed in the temperature range from 1500 to 1550 °C in air. Uniaxial pressure was applied at high temperature during the bonding process. The surface roughness to be bonded (Rmax) was about 3 μm. Bonding strength was measured by four-point bending tests and the strength of the
Takayuki NAGANO +2 more
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Crystallization studies in mullite and mullite–YSZ beads
Journal of the European Ceramic Society, 2010Abstract Mullite and mullite/Y-ZrO2 (25 and 50 vol.%) beads were produced by thermal spraying in water the corresponding atomised compositions. The amount of amorphous phases in the as-sprayed beads was comparatively determined by X-ray diffraction (XRD) and differential thermal analysis (DTA) methods.
E. Garcia +3 more
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Electrospun mullite nanofibers derived from diphasic mullite sol
Journal of the American Ceramic Society, 2017Abstract Fine‐grained mullite nanofibers derived from the diphasic mullite sol were successfully fabricated by electrospinning and subsequent pyrolysis at 1500°C. Polymethylsiloxane and aluminum tri‐sec‐butoxide were selected as the silicon and aluminum source to synthesize the diphasic sol.
Xue Dong +6 more
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Fiber-coatings for fiber-reinforced mullite/mullite composites
Le Journal de Physique IV, 2001Mullite-based fiber-reinforced composites are favorite candidates for the application in combustion chambers of gas turbines. The application requires damage tolerance, temperature and oxidation-resistance at high temperatures (>1200°C) over long terms. In order to realize crack deflection and fiber pull-out, an interphase coating of the mullite fibers
K. Nubian +3 more
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Mechanical behaviour of mullite composites reinforced with mullite fibres
Materials Science and Engineering: A, 1995Abstract Mullite matrix composites uniaxially reinforced with uncoated and BN (0.3 or 1 μm thick) coated mullite fibres were consolidated to 82 to 98% of TD (theoretical density) at 1300 °C by using a colloidal processing route to make mullite matrix.
J.-S. Ha, K.K. Chawla
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Fine milling of fused mullite and mullite-corundum
Refractories, 1981Milling time during the fine grinding of fused mullite and mullite-corundum powders in a vibromill instead of a ballmill can be reduced by a factor of five. The addition of sulfite lye or ethyl silicate in amounts of 0.1% reduces by a factor of 12–18 the vibromilling time, but iron pickup is increased. Grinding in a jet mill causes the specific surface
V. A. Ustichenko, V. S. Shapovalov
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Interface engineering in mullite fiber/mullite matrix composites
Journal of the European Ceramic Society, 2008Mullite fiber/mullite matrix composites are attractive because of their inherent oxidation resistance at high temperatures. Mullite has better creep resistance than alumina. However, chemical interactions between oxides are often very severe; with the result no gain is made over monolithic mullite in terms of toughness.
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Thermal Degradation of Fiber Coatings in Mullite‐Fiber‐Reinforced Mullite Composites
Journal of the American Ceramic Society, 1997The thermal degradation behavior of single‐layer BN and of double‐layer BN/SiC chemically vapor‐deposited fiber coatings in mullite‐fiber‐reinforced mullite composites was investigated by means of transmission electron microscopy after processing and heat treatment of the composites at 1000°, 1200°, and 1300°C for 6 h in air.
Schmücker, M. +4 more
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Processing of diphasic mullite and mullite-alumina composite precursors
2021Diphasic mullite and mullite-alumina composite precursors were prepared from the silica source (Na2SiO35H20) (a cheap industrial by-product) and the alumina source (AlCl36H2O) by a coprecipitation method (aluminium nitrate and colloidal silica were used to prepared mullite-alumina composite precursor as a comparison), aiming to understand the mullite ...
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