Zobrazeno 1 - 10
of 114
pro vyhledávání: '"Costica Bejinariu"'
Publikováno v:
Annals: Series on engineering sciences (Academy of Romanian Scientists), Vol 16, Iss 1, Pp 5-22 (2024)
The occupational safety self-assessment system for small and medium-sized enterprises (SMEs) is a powerful tool, through which SMEs or departments of a large enterprise can decide where and how occupational safety and health activity should be improv
Externí odkaz:
https://doaj.org/article/6a033cba4aaa4b63b80cc9ee65233b1a
Autor:
Nicanor Cimpoesu, Viorel Paleu, Catalin Panaghie, Ana-Maria Roman, Alin Marian Cazac, Lucian-Ionel Cioca, Costica Bejinariu, Stefan Constantin Lupescu, Mihai Axinte, Mihai Popa, Georgeta Zegan
Publikováno v:
Metals, Vol 14, Iss 7, p 836 (2024)
Biodegradable metallic materials are gaining attention for medical applications in short-term implants (15–500 days) because of their good mechanical properties, biocompatibility, and generalized corrosion. Most medical applications involve implant
Externí odkaz:
https://doaj.org/article/e0aa228fb5b247aba004197d75799283
Autor:
Romeo Gabriel Chelariu, Ramona Cimpoesu, Adrian Marius Jurca, Catalin Mihai Popa, Marcelin Benchea, Gheorghe Badarau, Bogdan Istrate, Alin Marian Cazac, Nicanor Cimpoesu, Dan-Dumitru Pintilie, Gabriel Dragos Vasilescu, Costica Bejinariu
Publikováno v:
Materials, Vol 17, Iss 10, p 2220 (2024)
We developed and analyzed a novel non-sparking material based on CuAlBe for applications in potentially explosive environments. Using a master alloy of CuBe, an established material for anti-sparking tools used in oil fields, mines, or areas with pot
Externí odkaz:
https://doaj.org/article/37be5aa81824402ead7608b290a6c6d7
Autor:
Ali İhsan Çelik, Yasin Onuralp Özkılıç, Özer Zeybek, Memduh Karalar, Shaker Qaidi, Jawad Ahmad, Dumitru Doru Burduhos-Nergis, Costica Bejinariu
Publikováno v:
Materials, Vol 15, Iss 22, p 8093 (2022)
In this study, ground glass powder and crushed waste glass were used to replace coarse and fine aggregates. Within the scope of the study, fine aggregate (FA) and coarse aggregate (CA) were changed separately with proportions of 10%, 20%, 40%, and 50
Externí odkaz:
https://doaj.org/article/57edb7fa75674ad0b078983b25c1c44c
Autor:
Syed Amir Ghazi Ali Shah, Ali Hassan, Najah Alsubaie, Abdullah Alhushaybari, Fahad M. Alharbi, Ahmed M. Galal, Diana-Petronela Burduhos-Nergis, Costica Bejinariu
Publikováno v:
Nanomaterials, Vol 12, Iss 22, p 4084 (2022)
This study is aimed to explore the magneto-hydrodynamic Carreau fluid flow over a stretching/shrinking surface with a convectively heated boundary. Temperature-dependent variable thermophysical properties are utilized to formulate the problem. The fl
Externí odkaz:
https://doaj.org/article/4c8b584e61074fc98c7818ac1c7b5359
Publikováno v:
European Journal of Materials Science and Engineering, Vol 2, Iss 4, Pp 119-126 (2018)
The submersible pumps are submerged in the fluid that must be pumped, this type of pump is capable to push out large volumes of water. The watertight subassembly of this equipment includes a variable power engine that can be used for various househol
Externí odkaz:
https://doaj.org/article/8adb226970464fe79c14a2f3fef9e5ed
Autor:
Dumitru Doru Burduhos Nergis, Petrica Vizureanu, Andrei Victor Sandu, Diana Petronela Burduhos Nergis, Costica Bejinariu
Publikováno v:
Materials, Vol 15, Iss 1, p 202 (2021)
Coal ash-based geopolymers with mine tailings addition activated with phosphate acid were synthesized for the first time at room temperature. In addition, three types of aluminosilicate sources were used as single raw materials or in a 1/1 wt. ratio
Externí odkaz:
https://doaj.org/article/46154fcc411443c08d01cdf7e882ed67
Autor:
Diana-Petronela Burduhos-Nergis, Gabriel Dragos Vasilescu, Dumitru-Doru Burduhos-Nergis, Ramona Cimpoesu, Costica Bejinariu
Publikováno v:
Applied Sciences, Vol 11, Iss 17, p 7802 (2021)
Phosphate coatings are one of the most important methods in preventing metal corrosion, especially iron alloys. The high interest in this method for industrial applications is mainly due to the low costs associated with the phosphating solution compo
Externí odkaz:
https://doaj.org/article/2e9801a7086f4dc79fdbb489a46473de
Publikováno v:
Materials, Vol 14, Iss 1, p 188 (2021)
The carbon steel is used in many areas due to its good mechanical properties; however, its low corrosion resistance presents a very important problem, for example, when carbon steel carabiners are used in the petroleum industry or navy, the possibili
Externí odkaz:
https://doaj.org/article/e0f5b74f5f6344589ffc9a74c1afadcc
Publikováno v:
Materials, Vol 13, Iss 15, p 3410 (2020)
This study approaches the issues which appear during carabiner use and analyses the possibility to eliminate them. Therefore, to improve the corrosion resistance of carbon steel, used in carabiners manufacturing, three different insoluble phosphate l
Externí odkaz:
https://doaj.org/article/f2f2d2e5b18b43baa75a998c632cdd68