Results 71 to 80 of about 24,721 (208)

Research on the generation mechanism of surface and subsurface damage in loose abrasive lapping of RB-SiC ceramics

Optics Express
Reaction-bonded silicon carbide ceramics (RB-SiC) are extensively utilized in aerospace, space optics, and other fields due to their superior physical and chemical properties. Loose abrasive lapping plays a crucial role in the optical manufacturing of large-diameter RB-SiC mirrors.
Lingzhong Li, Yang Bai, Erhui Qi, Haixiang Hu, Yiren Wang, Fukun Li, Xiaokun Wang, Xuejun Zhang   +7 more
openaire   +2 more sources

Ceramic Production and Geodiversity in Iron Age Iberia: An Archaeometric Study of Pottery from Castrejón de Capote (SW Spain)

Archaeometry, EarlyView.
ABSTRACT The hillfort of Castrejón de Capote is one of the best investigated settlements of Late Iron Age southwest Iberia. Located in the territory that the classical sources attributed to the Celtici, it was occupied between the early 4th and the 1st centuries bce.
Beatrijs de Groot, Luis Berrocal‐Rangel, Manuel Fernández‐Götz   +2 more
wiley   +1 more source

Evidence of the Formation of Crystalline Aluminosilicate Phases in Glass-Ceramics by Calcination of Alkali-Brick Aggregates, Enabling Cs⁺, Rb⁺, Co²⁺, and Sr²⁺ Encapsulation

Applied Sciences
The feasibility of using brick aggregates for the preparation of aluminosilicate “glass-ceramic” forms as a novel cementitious composite capable of immobilizing radioactive elements was examined. Raw brick was initially activated with sodium hydroxide. X-
Abdel Boughriet, Gildas Doyemet, Nicole Poumaye, Véronique Alaimo, Sandra Ventalon, Viviane Bout-Roumazeilles, Michel Wartel   +6 more
doaj   +1 more source

Analysis of Flexural Strength and Contact Pressure After Simulated Chairside Adjustment of Pressed Lithium Disilicate Glass-Ceramic [PDF]

, 2018
Statement of problem Research evaluating load-to-failure of pressed lithium disilicate glass-ceramic (LDGC) with a clinically validated test after adjustment and repair procedures is scarce.
Berzins, David W., Maroulakos, Georgios, Ramadhan, Ali, Thompson, Geoffrey A.   +3 more
core   +1 more source

The Material Basis of 18th‐Century Meissen Porcelain

Archaeometry, EarlyView.
ABSTRACT In the summer of 1708, the quest for making hard‐paste porcelain from Saxonian clay and other mineral resources succeeded. This was achieved by applying as its essential ingredient newly discovered pure kaolin from Heidelsberg near Aue, western Saxon Ore Mountains.
Robert B. Heimann
wiley   +1 more source

An overview of aerospace gas turbine technology of relevance to the development of the automotive gas turbine engine [PDF]

Technology areas related to gas turbine propulsion systems with potential for application to the automotive gas turbine engine are discussed. Areas included are: system steady-state and transient performance prediction techniques, compressor and turbine ...
Evans, D. G., Miller, T. J.
core   +1 more source

Crystallite size distribution and dislocation density in nanocrystalline silicon nitride powders produced by two different procedures [PDF]

, 2001
Két különböző eljárással készült nanokristályos szilicium-nitrid por mikroszerkezetét vizsgáltuk röntgen vonalprofil analízissel. Az egyik mintát termikus plazmában SiCl(4) és NH(3) gőzfázisú szintézisével majd kristályosításával készítettük, míg a ...
Gubicza, Jenő, Mohai, Ilona, Ribárik, Gábor, Szépvölgyi, János, Ungár, Tamás   +4 more
core  

Wari Lithic Technology on the Northern Coast of the Andes: Geochemical, 2D Geometric Morphometric, and Technological Analyses of Obsidian Bifaces From San José de Moro

Archaeometry, EarlyView.
ABSTRACT This study examines Wari obsidian production in a cache of 39 bifaces found at the Late Moche site of San José de Moro (Jequetepeque Valley, North Coast of Peru, 700–850 ad). Portable X‐ray fluorescence, geometric morphometric, and technological analyses were used to investigate raw material provenance and bifacial production.
Antonio Pérez‐Balarezo, Luis Jaime Castillo, Jalh Dulanto   +2 more
wiley   +1 more source

Post‐curing effects on mechanical properties staining resistance of a 3D‐printed resin versus a direct composite for definitive restorations

European Journal of Oral Sciences, EarlyView.
Abstract This study evaluated the mechanical performance and staining resistance of a three‐dimensional (3D)‐printed resin (VarseoSmile Crown Plus) subjected to different post‐curing times (0, 5, 10, 15, and 20 min), compared with a conventional nanofilled resin composite (Filtek Z350XT).
Bianca Rossi, Arthur Henrique Marques Massarenti, Giulia Gamero Pizzanelli, Márcia Valéria Gualberto Barbosa de Queiroz, Filipe Milazzo dos Santos, Matheus Kury, Adriano Fonseca Lima   +6 more
wiley   +1 more source

Magnetic and dielectric properties of multiferroic Eu0.5Ba0.25Sr0.25TiO3 ceramics

, 2012
Dielectric and magnetic properties of Eu0.5Ba0.25Sr0.25TiO3 are investigated between 10 K and 300 K in the frequency range from 10 Hz to 100 THz.
Christelle Kadlec, Goian V, Jan Prokleška, Katsufuji T, Maxim Savinov, Nan C-W, Pendlebury JM, Přemysl Vaněk, Shushkov AO, Shvartsman VV, Stanislav Kamba, Veronica Goian   +11 more
core   +1 more source