منابع مشابه
Redistribution of Aluminum Ions During Processing of Sialon Ceramics
J . Phys. Chem. Solids, 41 [6] 647-52 (1979). 24E. M. Logothetis and J. K. Park, “Charge Transport and Lattice Defects in COO,” Solid State Commun., 43 [7] 543-46 (1982). ”H:C Chen and T. 0. Mason, “Thermoelectric Study of Cobaltous Oxide Defect Structure,” J . Am. Ceram. Soc., 64 [lo] C-130-C-133 (1981). 2bJ. Nowatny, 1. Sikora, and M. Rekas, “Defect Structure and Electrical Properties of Undo...
متن کاملCavitation Damage During Flexural Creep of SiAlON–YAG Ceramics
Cavitation damage in flexure bars crept at 1170°C was studied by a density measurement technique. The cavity density within the flexure beams could be approximated by a linear function of position from the tensile surface. A threshold stress for cavitation damage is suggested from the results of this study. Below the threshold tensile stress, cavitation ceases, whereas above the threshold, cavi...
متن کاملThe Sialon Network
Data from 23 European countries show that the annual number of HIV diagnoses in men who have sex with men (MSM) increased by 86% between 2000 and 2006. This paper reports the main preliminary results of a bio-behavioural survey in MSM with a specific focus on HIV prevalence and use of United Nations General Assembly Special Session (UNGASS) indicators in six cities in Southern and Eastern Europ...
متن کاملEffect of Seeding on the Microstructure and Mechanical Properties of alpha-SiAlON: II, Ca-alpha-SiAlON
Seeding effects on the microstructure and mechanical properties of single-phase Ca-α-SiAlON ceramics have been investigated. Whereas a small amount of seeds can transform the microstructure from one of fine equiaxed grains to one consisting of many needle-like grains, the highest fracture toughness of 8 MPa . m1/2 is not reached until 8% seeding. This contrasts with the much higher seed efficie...
متن کاملThe Effect of Powder Mixing Procedures on α- SiAlON
Various procedures of mixing starting powders for hot-pressing α-SiAlON ceramics were studied. They included different milling methods (attrition milling, ball milling, and sonication), liquid medium (water, isopropyl alcohol, and pyridine), and atmospheres (ambient air and nitrogen). These mixing procedures resulted in markedly different densification behavior and fired ceramics. As the powder...
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ژورنال
عنوان ژورنال: Journal of the Japan Society of Powder and Powder Metallurgy
سال: 1996
ISSN: 0532-8799,1880-9014
DOI: 10.2497/jjspm.43.1117