Zobrazeno 1 - 10
of 233
pro vyhledávání: '"Florin Popa"'
Autor:
Ramona Crainic, Elena Mihaela Nagy, Gabriel Fodorean, Mihai Vasilescu, Petru Pascuta, Florin Popa, Radu Fechete
Publikováno v:
Agriculture, Vol 14, Iss 10, p 1826 (2024)
Biosolids from stabilized sludge present a high fertilization potential, due to their rich content of nutrients and organic matter. The intrinsic and subtle properties of such fertilizers may greatly influence the fertilization efficiency. In this se
Externí odkaz:
https://doaj.org/article/30186ded7b934b50b1a456ecb3f83e9f
Cu-Al-Ni Nanocrystalline Compacts Obtained by Spark Plasma Sintering of Mechanically Alloyed Powders
Autor:
Calin-Virgiliu Prica, Traian Florin Marinca, Florin Popa, Argentina Niculina Sechel, Bogdan Viorel Neamțu, Horea Florin Chicinaș, Ionel Chicinaș
Publikováno v:
Materials, Vol 17, Iss 19, p 4847 (2024)
The aim of this work is to obtain Cu-13.5Al-4Ni alloy for use as shape memory alloy by Spark Plasma Sintering (SPS) of mechanically alloyed powder. The study investigates the structural and microstructural changes in terms of crystal parameters, crys
Externí odkaz:
https://doaj.org/article/59700239f6df4a8090aca30a1c934767
Autor:
Florin Popa, Traian Florin Marinca, Niculina Argentina Sechel, Dan Ioan Frunză, Ionel Chicinaș
Publikováno v:
Materials, Vol 17, Iss 17, p 4355 (2024)
Fe50Mn35Sn15 Heusler alloy, obtained by mechanical alloying, was subjected to larger milling times in the range of 30–50 h to study the phase stability and morphology. X-ray diffraction studies have shown that the milled samples crystallise in a di
Externí odkaz:
https://doaj.org/article/cf436ff997f34072bd36a74c2385fb2e
Autor:
Traian Florin Marinca, Loredana Cotojman, Florin Popa, Bogdan Viorel Neamțu, Călin-Virgiliu Prică, Ionel Chicinaș
Publikováno v:
Materials, Vol 17, Iss 16, p 4139 (2024)
Soft magnetic composite cores were produced by spark plasma sintering (SPS) from Ni3Fe@ZnFe2O4 and NiFeMo@ZnFe2O4 pseudo-core-shell powders. In the Fe-Ni alloys@ZnFe2O4 pseudo-core-shell composite powders, the core is a large nanocrystalline Permallo
Externí odkaz:
https://doaj.org/article/15e77b3484f04d3890936c4c25eeee82
Autor:
Florin Popa, Traian Florin Marinca, Niculina Argentina Sechel, Dan Ioan Frunzӑ, Ionel Chicinaș
Publikováno v:
Nanomaterials, Vol 14, Iss 13, p 1156 (2024)
A Ni2MnSn Heusler alloy was obtained as a single B2 phase after 12 h of mechanical milling. The influence of prolonged milling on the phase stability was analysed for milling times up to 50 h, related to mean crystallite size, lattice strain, and ele
Externí odkaz:
https://doaj.org/article/2ffc10a8f78d4947901fbb2b977f6c95
Publikováno v:
Metals, Vol 14, Iss 6, p 647 (2024)
The influence of elevated temperatures and strain rate on the mechanical and structural properties of steel 42CrMo4 were analysed experimentally in this paper. The experiments were based on uniaxial tension and compression tests at high temperatures
Externí odkaz:
https://doaj.org/article/3f5a554f428a4e2e863704ca57ea0b49
Autor:
Maria Vălean, Daniela Lucia Manea, Claudiu Aciu, Florin Popa, Luminița Monica Pleșa, Elena Jumate, Gabriel Furtos
Publikováno v:
Buildings, Vol 14, Iss 2, p 507 (2024)
The rising concern for the environment and the need for a sustainable economic model has stimulated experimentation in the field of construction materials, notably in replacing certain components from cementitious materials with construction and demo
Externí odkaz:
https://doaj.org/article/8343f3a4640347b88f7fb966afac12cb
Publikováno v:
Materials, Vol 17, Iss 2, p 485 (2024)
In light of the urgent need to develop environmentally friendly materials that, at some point, will allow the reduction of concrete and, consequently, cement consumption—while at the same time allowing the reuse of waste and industrial by-products
Externí odkaz:
https://doaj.org/article/b406267e8e1f47bea0cce94e195a14e0
Autor:
Amalia Mesaros, Bogdan Viorel Neamțu, Traian Florin Marinca, Florin Popa, Gabriela Cupa, Otilia Ruxandra Vasile, Ionel Chicinaș
Publikováno v:
Nanomaterials, Vol 14, Iss 2, p 149 (2024)
Our study is focused on optimizing the synthesis conditions for the in situ oxidation of Fe particles to produce Fe@Fe3O4 core–shell powder and preparation via co-precipitation of ZnFe2O4 nanoparticles to produce Fe@Fe3O4/ZnFe2O4 soft magnetic comp
Externí odkaz:
https://doaj.org/article/885aa6f346e54c439be0bc38c85cbd02
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-17 (2022)
Abstract Nano-lubricants offer improved tribological properties in many applications, such as machines and engines. The presence of nanoparticles in the lubricating oil affects its wear, friction, thermal, chemical and physical properties in many way
Externí odkaz:
https://doaj.org/article/27b55ba6491e48aeb3f33198df8b9efc