Results 91 to 100 of about 348,730 (268)

Phase content of metal-matrix composites of the system Fe-W-C which are formed by plasma precipitation

Advanced Engineering Research, 2007
Melt crystallization peculiarities of the system have been investigated by means of X-Ray diffraction and microstructure analysis. It is shown that content changing of hexagonal tungsten carbide in the mixture essentially influences processes of phases ...
A.A. RYZHKIN, A.V. ILYASOV
doaj  

Strain‐Induced NbC Precipitation as a Governing Mechanism for Hot Deformation Resistance in CrNiMnMoB Ultrahigh‐Strength Steels

steel research international, EarlyView.
Strain‐induced NbC precipitation governs hot‐deformation resistance in CrNiMnMoB ultrahigh‐strength steel by suppressing dynamic recrystallization, increasing activation energy, and refining martensitic substructures. The precipitation response is controlled by temperature, supersaturation, and strain rate, with slow deformation promoting extensive NbC
Atef Hamada, Ali Khosravifard, Khaled Elanany, Ahmed W. Abdelghany, Jukka Kömi, Pasi Suikkanen, Mohammed Ali   +6 more
wiley   +1 more source

EFFECT OF SINTERING TEMPERATURE ON TUNGSTEN CARBIDE DENSITIES AND POROSITY

Jurnal Teknik Mesin
The manufacture of tungsten carbide begins with mixing WC with Co in the milling process and then the compaction process is carried out using a compacting machine. After that, the sintering process is carried out to increase the strength of the material.
Ade Saputra Ade
doaj   +1 more source

Design of cemented tungsten carbide and boride-containing shields for a fusion power plant

, 2018
Results are reported on cemented tungsten carbide (cWC) and boride-containing composite materials for the task of shielding the centre column of a superconducting tokamak power plant.
C. Windsor, J. Marshall, J. Morgan, J. Fair, G. Smith, A. Rajczyk-Wryk, J. Tarragó   +6 more
semanticscholar   +1 more source

Effect of Different Surface Treatments on Resistance to Abrasive Wear of AISI 4140 Steel

steel research international, EarlyView.
This study investigates how different surface treatments affect resistance to abrasive wear of AISI 4140 Steel. The wear rate was significantly higher in samples subjected to conventional treatments than in samples coated using the HVOF process, demonstrating the superior efficiency of coatings applied by thermal spraying in mitigating abrasive wear ...
Everton Freitas de Oliveira, Tomasz Trzepieciński, Valmir Dias Luiz, Jorge Luis Coleti   +3 more
wiley   +1 more source

Engineering Lithium Vacancies Through Group 13 Metal Incorporation in Cubic Li3Sb

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
The two novel solid solution series Li12−3xGaxSb4 and Li12−3xInxSb4 crystallize as defect variants of β‐Li3Sb. Aliovalent Ga/In substitution induces tunable Li‐vacancy formation, accompanied by composition‐dependent lattice contraction for Ga or expansion for In.
Jan Meyer, Marina Görgmayr, Anatoliy Senyshyn, Volodymyr Baran, Wilhelm Klein, Thomas F. Fässler   +5 more
wiley   +1 more source

Effects of Calcium Hydroxide Paste and Access Cavities on Fracture Strength of Mature and Simulated Immature Human Teeth: Ex Vivo

Australian Endodontic Journal, EarlyView.
ABSTRACT The aim was to examine whether a Ca(OH)2 paste affects fracture strength of teeth. Sixty extracted maxillary central incisors were prepared to simulate immature teeth. Another 40 were used as mature teeth. The ten groups (n = 10) were: (1) immature control; (2) immature + access; (3) immature + access + 1 m Ca(OH)2; (4) immature + access + 12 ...
Naseem M. Hashim, Paul V. Abbott
wiley   +1 more source

From glacial echoes to timber pathways: Climatic–historical drivers and timber‐trade influence on the phylogeography of Ips sexdentatus in the Basque Country

Agricultural and Forest Entomology, EarlyView.
Ips sexdentatus is expanding across southern Europe, attacking multiple Pinus species and showing the ability to colonize trees at early stages of decline. Genetic analysis of 668 individuals revealed 106 haplotypes, with Iberian populations as diversity hotspots, reflecting long‐term refugial persistence alongside more recent demographic expansion ...
Dimitrios N. Avtzis, Nebai Mesanza, Aitor Saez de Zerain, Diego Llamazares, Eugenia Iturritxa   +4 more
wiley   +1 more source

Phase content of metal-matrix composites of the system Fe-W-C which are formed by plasma precipitation

Вестник Донского государственного технического университета, 2018
Melt crystallization peculiarities of the system have been investigated by means of X-Ray diffraction and microstructure analysis. It is shown that content changing of hexagonal tungsten carbide in the mixture essentially influences processes of phases ...
A.A. RYZHKIN, A.V. ILYASOV
doaj  

Evaluation of the Effects of Different Types of Finishing and Polishing Protocols on the Surface Roughness of Restorative Materials

European Annals of Dental Sciences
Purpose: This study aimed to evaluate the effects of different types of finishing and/or polishing protocols on the surface roughness of two different restorative materials that are frequently preferred in pediatric dentistry.
Şaziye Sarı, Akif Demirel, Shadia Majid Abubakary   +2 more
doaj   +1 more source