Results 51 to 60 of about 31,851 (184)

Effect of Occlusal Adjustment and Subsequent Repolishing on the Translucency Parameter, Contact Angle, and Flexural Strength of Different Types of Glazed Monolithic Zirconia

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objectives This study evaluated the effects of material and surface condition (glazed vs. polished after simulated occlusal adjustment) on translucency parameter, contact angle, and flexural strength of four monolithic zirconia. Materials and Methods Disk‐shaped specimens (n = 80, Ø12 × 1 mm) were fabricated from four monolithic zirconia ...
Kelli Nunes Monteiro, Rafaela Paschoalin Nigro, Stéphanie Soares Favero, Ranulfo Benedito de Paula Miranda, Estevam Augusto Bonfante, Paulo Francisco Cesar   +5 more
wiley   +1 more source

Melting point of yttria [PDF]

, 1977
Fourteen samples of 99.999% Y/sub 2/O/sub 3/ were melted near the focus of a 250-W CO/sub 2/ laser. The average value of the observed melting point along the solid--liquid interface was 2462 +- 19/sup 0/C. Several of these same samples were then melted in ultrahigh-purity oxygen, nitrogen, helium, or argon, and in water vapor. No change in the observed
openaire   +2 more sources

Yttria nanopowders for transparent yttria ceramics prepared by precipitation sol-gel method

FunGlass School 2018/part 2 : Book of abstracts., 2018
{"references": ["D. Sordelet, Journal of Colloid and Interface Science, 122, 47-59, (1988)", "M. Ciftcioglu, J. Am. Ceram. Soc, 70 ,329-334 (1987)", "D.C.Grahame, Chemical Review, 41,441-451 (1987)"]}
Nibu Putenpurayil Govindan, Michálková, Monika, Dušan Galusek   +2 more
openaire   +1 more source

Color stability of precolored and extrinsically colored monolithic multilayered polychromatic zirconia: Effects of surface finishing and aging

Journal of Prosthodontics, EarlyView.
Abstract Purpose To explore the impact of zirconia types, coloring methods, and surface finishing on the color stability of monolithic multilayered polychromatic zirconia after artificial aging, including thermocycling and simulated toothbrushing. Materials and Methods Eighty square‐shaped zirconia samples were divided into 2 types (M3Y‐TZP and M6Y‐PSZ)
Feras M. Abounassif, Amal Alfaraj, Thuraya Gadah, Chao‐Chieh Yang, Tien‐Min G. Chu, Wei‐Shao Lin   +5 more
wiley   +1 more source

Ce3+ DOPED YTTRIA NANOPOWDERS FOR TRANSPARENT YTTRIA CERAMICS PREPARED BY PRECIPITATION METHOD

FunGlass School 2018/ part1_Book of Abstracts., 2018
In optics, transparency is the physical property of materials allowing light pass through it without being scattered. Transparent polycrystalline ceramic (TPC) materials have attracted a significant attention as candidates for various applications, including laser gain media in solid state lasers, electro-optical devices and scintillators. Yttria (Y2O3)
N. P. Govindan, M. Michálková, D. Galusek   +2 more
openaire   +1 more source

Evaluation of shear bond strength based on substructure materials and ceramic veneering techniques

Journal of Prosthodontics, EarlyView.
Abstract Purpose Bilayered restorations have both the strength of the substructure material and the esthetics of the veneer material; however, they should have appropriate bonding between the two materials. This study aimed to evaluate the shear bond strength (SBS) according to the substructure material and veneering technique used in bilayered ...
Han‐Sol Song, Yoon‐Hyuk Huh, Chan‐Jin Park, Lee‐Ra Cho, Kyung‐Ho Ko   +4 more
wiley   +1 more source

Effect of sintering cycle on the strength and translucency of multilayered zirconia

Journal of Prosthodontics, EarlyView.
Abstract Purpose A newly introduced sintering protocol promises to offer higher translucency while not significantly compromising the flexural strength of the material. However, the effect of the novel sintering protocol has not been thoroughly validated.
Kedith Sawangsri, Steven Makowka, Sompop Bencharit, Hyeongil Kim   +3 more
wiley   +1 more source

NASA thermal barrier coatings: Summary and update [PDF]

A durable, two-layer, plasma-sprayed coating consisting of a ceramic layer over a metallic layer was developed that has the potential of insulating hot engine parts and thereby reducing metal temperatures and coolant flow requirements and/or permitting ...
Stepka, F. S.
core   +1 more source

Assessment of impact of a control die on marginal fidelity of milled zirconia crown copings for finishing and polishing

Journal of Prosthodontics, EarlyView.
Abstract Purpose This study evaluated and compared the marginal fidelity of milled zirconia copings before and after finishing and polishing with and without a control die. Materials and Methods This prospective multicenter in vitro trial involved two methods regularly used in two clinics for hybrid and full‐digital workflows.
Marwan Al Akkad, John Sorensen, Omar Hamadah, Iva Voborna, Marek Matoušek, Radek Mounajjed   +5 more
wiley   +1 more source

Durability of zirconia thermal-barrier ceramic coatings on air-cooled turbine blades in cyclic jet engine operation [PDF]

Thermal barrier ceramic coatings of stabilized zirconia over a bond coat of Ni Cr Al Y were tested for durability on air cooled turbine rotor blades in a research turbojet engine.
Jacobs, R. E., Liebert, C. H., Morse, C. R., Stecura, S.   +3 more
core   +1 more source