Results 61 to 70 of about 4,745,577 (253)

Microhardness of polyethylene surface modified by chlorosulphonic acid

Polymer Testing, 2000
Chlorosulphonic acid etching of polyethylene produces changes in its surface structure that can be tested by means of microhardness measurements. The results of different microhardness parameters (Mayer's lines, penetration curves, Vickers microhardness and total microhardness) are compared, discussed and related to the structure of polyethylene.
J.M Pereña, V Lorenzo, G Zamfirova, A Dimitrova   +3 more
openaire   +1 more source

Effect of Probiotic Mouthrinses on Surface Microhardness of Esthetic Restorative Materials

The Journal of Contemporary Dental Practice, 2020
To assess the influence of three probiotic mouthrinses on the microhardness of three esthetic materials used for teeth restorations.Thirty specimens of each material: conventional glass ionomer cement (GIC), resin-modified glass ionomer, and resin composite were randomly assigned to three groups. Surface microhardness was measured at baseline.
Bashaer, Altwaim, Fouad, Salama, Shahad, Alogayyel   +2 more
openaire   +2 more sources

Surface roughness, optical properties, and microhardness of additively and subtractively manufactured CAD-CAM materials after brushing and coffee thermal cycling. [PDF]

PURPOSE To evaluate the surface roughness, optical properties, and microhardness of additively or subtractively manufactured CAD-CAM materials after simulated brushing and coffee thermal cycling.
Abou-Ayash, Samir, Fonseca, Manrique, Çakmak, Gülce, Yilmaz, Burak, Donmez, Mustafa Borga, Kahveci, Çiğdem, Silva de Paula, Marcella, Akay, Canan, de Paula, Marcella Silva   +8 more
core   +2 more sources

Effects of Mg on Microstructure and Solidification of a Hypereutectic Zn–8 wt.%Al Alloy

Advanced Engineering Materials, EarlyView.
An appreciable set of results involving thermal data, microstructure, chemical composition, and microstructural growth laws is reported for ZnAlMg alloys. Such results demonstrate that ZnAlMg alloys have high potential for applications in automotive self‐lubricating components, batteries, and electrical systems.
Raí B. de Sousa, Jeverton L. Paixão, Daylla S. Silva, Bruno S. Sobral, Mucio D. de Medeiros, José E. Spinelli, Bismarck L. Silva   +6 more
wiley   +1 more source

Avaliação da microdureza da dentina radicular após o uso de soluções irrigadoras e do curativo com hidróxido de cálcio [PDF]

, 2014
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Odontologia, Florianópolis, 2014.O objetivo deste estudo foi avaliar a influência do uso de soluções irrigadoras e do uso ...
Pinto, Larissa Fernanda
core  

Influence of Mineral Composition in Natural Granite Rocks on Microhardness [PDF]

, 2021
Granites are becoming increasingly popular and, as a result, their areas of use are expanding. In addition to their colour and particle size, the surface roughness of the machined material is becoming an important aspect of their application. In order to
Kelemen-Cserta, Eszter, Gyurika, István Gábor, István Gábor Gyurika, Eszter Kelemen-Cserta   +3 more
core   +1 more source

Thermal Cycle–Microstructure–Property Relationships in Rail Steel Heat‐Affected Zone Simulated by Gleeble

Advanced Engineering Materials, EarlyView.
Microstructural evolution of premium rail steel during flash butt welding (FBW), comparing physically simulated heat‐affected zones with actual weld regions. Thermal cycles induce phase transformations and microstructural heterogeneity that influence weld quality and mechanical performance. These findings provide insights into optimizing FBW parameters
Emmanoelle Cintra da Cunha Araújo, João Marcos da Silva Nunes, Marcelly Cristiny Nunes de Carvalho, Alex Rojas, Cristie Luis Kugelmeier, Cristhian Ricardo Loayza Loayza, João Carlos Ferreira, Maria Veronica Goncalves Rodrigues, Rute Sayuri Kano, Isaac Araújo Furtado, Jacyara Dalylla da Silva Nunes, Jhonatan Peres de Sousa, Marcos Natan da Silva Lima, Eden Santos Silva, Gedeon Silva Reis, Samuel Filgueiras Rodrigues   +15 more
wiley   +1 more source

Microstructural Evolution and In Situ Formation of TiB and TiC in Ti─5Al─2.5Sn Alloy Processed by Powder Metallurgy

Advanced Engineering Materials, EarlyView.
Accelerated in situ formation of TiB and TiC in Ti–5Al–2.5Sn–B4C is driven by transient liquid phase formation, which enhances particle reactions and microstructural evolution. This process increases hardness and establishes a coupled relationship between sintering temperature and reinforcement content, strongly influencing porosity in the resulting ...
Fernando. Y. Kojima, Juliano. Soyama
wiley   +1 more source

Comparing the Effect of Topical Acidulated Phosphate Fluoride on Micro- Hardness of Two Fissure Sealants and One Flowable Composite

Journal of Dental School, 2019
Objective: Probable effect of fluoride containing materials like APF on sealants is very important. The purpose of this study is to assess the effect of frequent application of APF (1.23%) on the surface microhardness of two fissure sealants and one ...
Romina Mazaheri, Leila Pishevar, Neda Keyhanifard, Elnaz Ghasemi   +3 more
doaj   +1 more source

Digital Light Processing of Thermoplastic Poly(methyl methacrylate) Photoresin Combined With Solvent Vapor Smoothing

Advanced Engineering Materials, EarlyView.
A thermoplastic PMMA‐based photoresin enables high‐resolution DLP printing followed by solvent‐vapor smoothing. The treatment reduces staircase‐induced surface roughness from 2.33 µm to 129 nm and increases visible‐light transmittance from approximately 30% to 80%, providing a route toward transparent PMMA components for rapid prototyping and non ...
Rozhin Heydarpour, Yuanyuan Li, Sebastian Kluck, Afnan Quazzie‐Hauser, Bastian E. Rapp, Frederik Kotz‐Helmer   +5 more
wiley   +1 more source