Preparation of Y-TZP/AI2O3 whisker preform by an in situ method

Okada, Kiyoshi; Kameshima, Y.; Mutoh, H.; Hayashi, Shigenari

doi:10.1007/bf00355974

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…In addition, the single temperature measurement of the present study was inadequate to make such determinations. In a related study, Okada et al 36 prepared Al 2 O 3 whiskers and found that the morphology changed from massive to rhombohedral to whiskers to platelets as the processing temperature increased.…”

Section: September 1999mentioning

confidence: 99%

Combustion Synthesis of Aluminum Nitride Particles and Whiskers

Bradshaw

Spicer

1999

Journal of the American Ceramic Society

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Aluminum nitride (AlN) was produced via the combustion synthesis of loosely packed aluminum powder (pore fraction of ∼0.8) in a graphite reactor that was lined with permeable carbon felt. Almost-complete conversion was achieved with a forced flow of nitrogen for beds 50-150 mm deep (mass of 200-650 g). The product was in the form of a loosely aggregated bed, with regions of distinct morphology, and had a predominantly whisker morphology. Some control over the microstructure was possible by changing the processing parameters. The addition of 5% of ammonia to the nitrogen resulted in a uniform production of whiskers, whereas a 50% solid-phase dilution with AlN favored the production of particles.

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Section: September 1999mentioning

confidence: 99%

Combustion Synthesis of Aluminum Nitride Particles and Whiskers

Bradshaw

Spicer

1999

Journal of the American Ceramic Society

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“…One of the various strategies to strengthen and toughen zirconia ceramics at higher temperature is the incorporation of particles, platelets, or whiskers with high moduli into the Y-TZP materials. [3][4][5][6][7][8][9] TiC particulate additives are one possibility due to their high moduli, high hardness, low density, and excellent oxidation resistance. It is expected that such second-phase inclusion may enhance fracture toughness at room temperature by crack deflection and a microcracking effect.…”

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis of Yttria‐Stabilized Tetragonal Zirconia Polycrystal Powder Containing Dispersed Titanium Carbide by Selective Carbonization

Liu

Wang

et al. 1999

Journal of the American Ceramic Society

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Reaction thermodynamics was utilized to analyze the selective carbonization conditions of ZrO 2 -TiO 2 -Y 2 O 3 ultrafine powder and to define the temperature range of the selective carbonization. The ZrO 2 -TiO 2 -Y 2 O 3 powder was prepared by coprecipitation from a solution containing Zr 4+ , Ti 4+ , and Y 3+ . The powder was selectively carbonized at 1350°, 1450°, 1550°, and 1650°C, respectively, for 2 h under argon atmosphere with sucrose as the carbon source. The resulting product was analyzed by X-ray diffraction. The experimental results indicated that the ZrO 2 -TiO 2 -Y 2 O 3 powder could be selectively carbonized in situ at 1450°C to form a carbonized powder which was composed of TiC and tZrO 2 . It was also found that zirconium carbide could be formed at 1550°C, which is much lower than the carbonization temperature of ZrO 2 defined by thermodynamics.

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“…To examine the angular distribution of a high energy photon in µ + → e + ννγ decay, we calculated the differential decay width of the radiative muon decay, retaining the positron mass (m e ), as a function of e + energy (E e ) and photon energy (E γ ) [6]. Those energies are normalized to a half of the muon mass (m µ /2), namely x = 2E e /m µ and y = 2E γ /m µ .…”

mentioning

confidence: 99%

Background suppression forμ→eγwith polarized muons

1997

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A search for the lepton-flavor-violating ϩ →e ϩ ␥ decay using polarized muons is reexamined in terms of suppression of the serious background arising from an accidental coincidence between an e ϩ in the normal muon decay and a high energy photon in the radiative muon decay, ϩ →e ϩ ␥. It is found that a high energy photon in ϩ →e ϩ ␥ decay is preferentially emitted parallel to the muon spin direction, similarly to e ϩ in the normal muon decay. The selective measurements of either e ϩ 's or photons moving antiparallel to the muon spin direction would suppress the accidental background for ϩ →e ϩ ␥ with right-handed and left-handed e ϩ 's, respectively. ͓S0556-2821͑97͒50205-0͔ PACS number͑s͒: 13.35.Bv, 11.30.Fs, 13.88.ϩe 55

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Preparation of Y-TZP/AI2O3 whisker preform by an in situ method

Cited by 4 publications

References 13 publications

Combustion Synthesis of Aluminum Nitride Particles and Whiskers

Combustion Synthesis of Aluminum Nitride Particles and Whiskers

In Situ Synthesis of Yttria‐Stabilized Tetragonal Zirconia Polycrystal Powder Containing Dispersed Titanium Carbide by Selective Carbonization

Background suppression forμ→eγwith polarized muons

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