Results 121 to 130 of about 104,890 (283)

Influence of Polybutene Concentration on Microhardness PP

, 2012
Tato bakalářská práce se zabývá měřením mikrotvrdosti polymerů. V teoretické části se zaměřuje na vlastnosti, zpracování a použití vybraných polymerů. Popisuje také různé me-tody zkoušek tvrdosti a mikrotvrdosti.
Šmach, Petr
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Effect of artificial aging and different surface finishing protocols on the flexural strength and surface hardness of a photopolymer for manufacturing monolithic polychromatic complete dentures using PolyJet 3D printing

Journal of Prosthodontics, EarlyView.
Abstract Purpose This study evaluated the effect of thermocycling and three different surface finishing protocols on the flexural strength and surface hardness of a novel photopolymer intended for manufacturing monolithic polychromatic dental prostheses using PolyJet 3D printing.
Francisco X. Azpiazu‐Flores, Ahmed Elfana, Chao‐Chieh Yang, Dean Morton, Wei‐Shao Lin   +4 more
wiley   +1 more source

Microhardness of the microstructural phases of laser hardened steels

, 2013
This study investigated the microhardness and microstructure of different steels hardened by a fibre laser. These samples included rolled steel, quenched and tempered steel, annealed alloyed steel and conventionally through-hardened steel. Microhardness (
Kujanpää, Veli, Uusitalo, Juha, Qiu, Feng   +2 more
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Effects of gastric acid on surface roughness, microhardness, fracture strength, and color change of dental ceramics: A systematic review of in vitro studies

Journal of Prosthodontics, EarlyView.
Abstract Purpose This systematic review evaluated the effects of simulated gastric acid (SGA) on surface and mechanical properties of dental ceramics to answer the research question: Does immersion in SGA alter the surface roughness, microhardness, fracture strength, and color of dental ceramics?
Geany Ferreira Rodrigues, Isaac Augusto Dantas Nogueira, Nicole Escórcio de Meneses, Ana Letícia Daniel Fontenele, Francisbênia Alves Silvestre, Ana Carolina Lima Moreira, Lívia Maria Sales Pinto Fiamengui, Karina Matthes de Freitas Pontes, Raniel Fernandes Peixoto   +8 more
wiley   +1 more source

Effect of resin type, cleaning solution, and aging on the mechanical properties and reliability of additively manufactured occlusal devices

Journal of Prosthodontics, EarlyView.
Abstract Purpose The purpose of this in vitro study was to investigate the effect of alcohol‐free cleaning solutions on the mechanical properties and reliability of additively manufactured occlusal device resins, compared with isopropyl alcohol (IPA), while considering the influence of aging.
Selim Polat, Ayyüce Nur Tezcan, Hanan Al‐Johani, Gülce Çakmak, Mustafa Borga Dönmez, Burak Yilmaz   +5 more
wiley   +1 more source

Іnfluence of tribotesting on microhardness of polymers

This study investigates the microhardness of the polymeric material Zedex zx-100k and other polymers following tribological testing at different sliding speeds.
R.M. Marchuk, O. I. Kushch, D.V. Nyshchuk, O. P. Yashchuk, R.G. Mnatsakanov   +4 more
core   +1 more source

Effects of 10% carbamide peroxide bleaching materials on enamel microhardness

, 2001
Purpose: To evaluate the microhardness of enamel treated with two different 10% carbamide peroxide bleaching materials at different time intervals. Materials and Methods: Two bleaching agents were analyzed: Opalescence (OPA) and Rembrandt (REM).
Basting, R. T., Rodrigues, A. L., Serra, Mônica da Costa, Rodrigues, J. A.   +3 more
core   +1 more source

Pressed lithium disilicate glass ceramics: Microstructural characterization, in vitro and in silico nonlinear dynamic analysis for biaxial flexural strength

Journal of Prosthodontics, EarlyView.
Abstract Purpose To evaluate the mechanical properties of lithium disilicates, and to assess the predictive capability of in silico models for biaxial flexural strength (BFS). Materials and Methods Specimens of four heat‐pressed lithium disilicates (IPS e.max Press, Rosetta SP, LiSi Press, Vintage Prime Press) were obtained.
Larissa M. M. Alves, Hefei Li, Satoshi Yamaguchi, Ernesto B. Benalcázar‐Jalkh, Tiago M. B. Campos, Edmara T. P. Bergamo, Laura F. Carvalho, Raphaelle S. M. de Sousa, Pedro H. Amorim, Edisa de Oliveira Sousa, Satoshi Imazato, Yu Zhang, Estevam A. Bonfante   +12 more
wiley   +1 more source

Microstructure and Microhardness of Laser Metal Deposition Shaping K465/Stellite-6 Laminated Material

, 2017
K465 superalloy with high titanium and aluminum contents was easy to crack during laser metal deposition. In this study, the crack-free sample of K465/Stellite-6 laminated material was formed by laser metal deposition shaping to control the cracking ...
Zhao YH(赵宇辉), Zhao JB(赵吉宾), Wang ZG(王志国), Zhang, Hongyu, Shi F(施凡)   +4 more
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Effect of a Synthetized Herbal Remineralizing Paste on Enamel Microhardness

Objectives This study aimed to synthesize an herbal remineralizing paste containing the extracts of Miswak, licorice, aloe vera, propolis, and honey and compare its effect with 5% sodium fluoride (NaF) and 1.23% acidulated phosphate fluoride (APF) on ...
Shokripour, Mohadese, Kavousinejad, Shiva   +1 more
core   +1 more source