Results 61 to 70 of about 80,900 (240)

Effect of Crystal Polymorphism on Elastic Modulus and Hardness of Poly(Butylene 2,6‐Naphthalate) (PBN)

Polymer Engineering &Science, EarlyView.
The research provides insight into the mechanical behavior of the high‐performance polyester Poly(Butylene 2,6‐Naphthalate) containing different crystal polymorphs, adjustable by the conditions of melt‐crystallization. ABSTRACT The modulus of elasticity and hardness of poly(butylene 2,6‐naphthalate) (PBN) were investigated at different length scales ...
Mengxue Du, Thomas Chudoba, Christina Wüstefeld, Ralf Lach, Katalee Jariyavidyanont, René Androsch   +5 more
wiley   +1 more source

DETERMINATION OF VICKERS MICROHARDNESS IN β-Ga2O3 SINGLE CRYSTALS GROWN FROM THEIR OWN MELT [PDF]

, 2015
The results of microhardness measurements of β-Ga2O3 single crystals for (001) crystallographic face are reported. The crystals were grown by the free crystallization with the "Garnet-2M" equipment.
V. I. Nikolaev, V. N. Maslov, A. E. Romanov, K. E. Aifantis, L. I. Guzilova   +4 more
core   +2 more sources

Effect of food-simulating liquids on flexural strength, Vickers microhardness, and surface roughness of IPS e.max Press and CEREC Tessera

Biomaterial Investigations in Dentistry
Background: Lithium disilicate ceramics are widely used for indirect restorations, yet their mechanical performance may be influenced by fabrication route and chemical challenge from foods and beverages.
Asmaa Abdeewi, Seham A. Elsawaay, Ahmed A. Mhanni, Abubaker Qutieshat   +3 more
doaj   +1 more source

Influence of toothpaste pH on its capacity to prevent enamel demineralization

Contemporary Clinical Dentistry, 2018
Aim: This study evaluated in vitro the remineralization capacity of commercial toothpastes with different fluoride (F) concentrations and their effectiveness when they are acidified.
Lidia Gavic, Kristina Gorseta, Ali Borzabadi-Farahani, Antonija Tadin, Domagoj Glavina   +4 more
doaj   +1 more source

Vickers Microhardness as a Viable Mechanical Property Measurement Technique for High Explosive Materials

Propellants, Explosives, Pyrotechnics, EarlyView.
There are multiple drivers for the development of reliable mechanical property techniques for high explosive (HE) samples, particularly smaller HE samples. While Vickers microhardness is a commonly used technique for mechanical characterization in metals and other materials, there has been little work using this technique for HE materials, particularly
Paul B. Mirkarimi
wiley   +1 more source

Microstructure, Defects, and Fatigue Response of High‐Strength Tool Steels

steel research international, EarlyView.
The martensitic tool steel family is designed for use in various working environments where they are subjected to repeatedly high mechanical loads. Despite the continuous upgrade of material´s microstructures through compositional development or processing techniques, defects remain a critical factor for the tool performance by leading to fatigue ...
Katerina Chantziara, Jens Bergström, Dimitrios Nikas, Mikael Thomas Grehk   +3 more
wiley   +1 more source

Evaluation of the Effect of Brushing on Vickers Microhardness of Acrylic Denture Base Resins Polymerized by Different Techniques

, 2023
Objectives: To prevent the negative effects of brushing on the microhardness of the acrylic resin, different polymerization techniques may be taken into consideration while choosing the denture base material.
Deste Gökay, Gonca, Gökçimen,G., OYAR, PERİHAN, Rona, Nergiz, Perihan OYAR, Gökay,G.D., Durkan,R., Gonca DESTE GÖKAY, Nergiz RONA, Gökçimen, Gülsüm, Rukiye DURKAN, Gülsüm GÖKÇİMEN, Durkan, Rukiye, Oyar,P., Gökay, Gonca Deste, Rona,N.   +15 more
core   +1 more source

Tailoring Laser Powder Bed Fusion and Post‐Processing Parameters for JIS SKD61 Tool Steels: Surface Roughness, Microstructure, and Mechanical Properties

steel research international, EarlyView.
Laser powder bed fusion of JIS SKD61 tool steel is systematically optimized using a Taguchi design and ANOVA. Hatch spacing and layer thickness are identified as dominant parameters controlling surface roughness and tensile strength. Subsequent tempering at 600°C improves microstructural stability and mechanical performance, enabling high‐density SKD61
Masrurotin Masrurotin, Andi Ard Maidhah, Maziar Ramezani, Wojciech Macek, Cho‐Pei Jiang   +4 more
wiley   +1 more source

Comparative Evaluation of Microhardness and Degree of Polymerization of Dual-cure Resin Cement on Luting Composite Resin Endocrowns of 5.5mm and 7.5mm Thicknesses: An in-vitro Study [PDF]

International Journal of Scientific Research in Dental and Medical Sciences
Background and aim: The aim of this in vitro study was to assess and compare the microhardness and degree of polymerization of dual-cure resin cement used for luting composite resin Endocrowns using the Vickers microhardness test and Fourier Transform ...
Prakruthi Nallikatte, Shony Mohan, Harsha Karunakaran, Ravichandran Rajagopal, Vivek Nair, Amal Shajahan   +5 more
doaj   +1 more source

Toward the Application of Multiaxial Failure Criteria: Mean Stress Sensitivity of Carbide‐Rich, High‐Alloy PM‐HIP Tool Steels Under Axial and Torsional Cyclic Loading

steel research international, EarlyView.
This study quantifies axial and torsional long‐life fatigue (LLF) behavior of three carbide‐rich PM‐HIP tool steels, correlating LLF strength with intrinsic defect size and cleanliness, thereby extracting material‐specific mean stress sensitivities and Haigh diagrams.
Lennart Mirko Scholl, Frederik Tegeder, Tobias Hajeck, Alexander Bezold, Christoph Broeckmann   +4 more
wiley   +1 more source