Results 1 to 10 of about 601,753 (251)

Preventing electrically induced subsurface initiated pitting failures (incl. WSF, WEC, WEA) with copper based lubricant additives

Frontiers in Mechanical Engineering
Premature bearing failures in large electric machines such as wind turbines and locomotives are often caused by White Etching Cracks (WEC), White Etching Areas (WEA), and White Structure Flaking (WSF)—phenomena that, despite extensive study, remain not ...
Sergei Mamykin, Marc Ingram, Leyla Alieva, Varvara Privalova   +3 more
doaj   +1 more source

Enhanced Mechanical Properties Via the Incorporation of Ti in Cu Alloys [PDF]

Archives of Metallurgy and Materials
The influence of Ti addition on the microstructure, mechanical properties and electrical conductivity of Cu-14Fe alloy is studied. Great emphasis has been laid on the second phase, texture and mechanical properties.
Huihui Yu, Qiang Hu, Yapan Huang, Yanqi Zeng, Jingxuan Jia, Q. Hu, Rui Hong, Youliang Zhang   +7 more
doaj   +1 more source

Accidentes fuera del trabajo: análisis en el campamento minero de Toquepala 2002-2003

Revista Médica Herediana, 2005
En general, todas las empresas desarrollan programas para evitar o minimizar los accidentes del trabajo. Sin embargo, existe escasa información técnica relacionado a la prevalencia y costos derivados de los accidentes fuera del trabajo, lo que dificulta ...
Raúl Gomero Cuadra, Carlos Llap Yesan, Livia Calizaya De la Sota, Ramón Silvera Vallejos   +3 more
doaj  

Influences of Alternating Magnetic Fieldson the Growth Behavior and Distribution of the Primary Fe Phasein Cu-14Fe Alloys during the Solidification Process

Metals, 2018
An alternating magnetic field (AMF) was applied during the solidification process of the Cu-14Fe alloy and the effect of the electromagnetic parameter, which impact the model and solidification technique of the solidification structure that were analyzed.
Jin Zou, De-Ping Lu, Ke-Ming Liu, Qing-Feng Fu, Zhe Zhou   +4 more
doaj   +1 more source

Effect of Casting Speed on Solidification Behavior and Porosity Defects in Low-Oxygen Copper Casting Rods Using SCR Technology

Journal of Manufacturing and Materials Processing
The Southwire Continuous Rod (SCR) process is widely used for producing low-oxygen copper rods, yet pore defects remain a significant challenge, affecting the performance and drawability of copper wire.
Qi Yu, Lei Zhang, Tao Wan, Delin Tang, Yong Zhang, Zhiyong Wu, Fangyou Zhong, Shuncong Le, Yang Hu, Hailiang Yu   +9 more
doaj   +1 more source

El trabajo a turnos como factor de riesgo para lumbago en un grupo de trabajadores peruanos.

Revista Médica Herediana, 2005
Objetivo: Identificar la asociación entre trabajo a turnos y lumbago en un grupo de trabajadores mineros. Materiales y métodos: Estudio Caso Control realizado el año 2003 en un grupo de trabajadores mineros. Se revisaron las historias electrónicas de los
Juan Carlos Palomino Baldeon, Fermín Ruíz Gutierrez, Gian Navarro Chumbes, Félix Dongo Lazo, Carlos Llap Yesan, Raúl Gomero Cuadra   +5 more
doaj  

La Medicina Ocupacional en los últimos tiempos.

Revista Médica Herediana, 2005
El ámbito de la práctica de la medicina ocupacional ha sufrido cambios importantes en este último siglo, como consecuencia de las expectativas de empleadores y trabajadores, así como de la sociedad y el Gobierno.
Raúl Gomero Cuadra, Carlos Llap Yesán
doaj  

Wheat straws-derived hierarchical porous carbon as electrode material for supercapacitor

Discover Electronics
Hierarchical porous carbon materials hold great potential in electrochemical energy storage, yet their efficient fabrication still faces numerous challenges. Herein, we successfully prepared hierarchical porous carbon materials with high specific surface
Zhenjuan Zang, Xiaolong Zhang, Baoshan Xia, Kelong Cao, Jinfeng Li, Qingguo Chen   +5 more
doaj   +1 more source

Paleozoic multi-stage magmatism in the Yuka terrane, North Qaidam orogenic belt: mantle modification, tectonic evolution, and geodynamic processes

Frontiers in Earth Science
The detailed study of HP/UHP metamorphic rocks and intermediate-acid rocks has revealed the complete tectonic evolution of the North Qaidam Orogenic Belt (NQOB), from oceanic to continental subduction and subsequent exhumation.
Yibin Lin, Chengtao Yu, Shuyuan Chen, Sudong Shi, Sangjiancuo Luo, Junaid Khan   +5 more
doaj   +1 more source

Biogenic nanoparticles: copper, copper oxides, copper sulphides, complex copper nanostructures and their applications

Biotechnology Letters, 2013
Copper nanoparticles have been the focus of intensive study due to their potential applications in diverse fields including biomedicine, electronics, and optics. Copper-based nanostructured materials have been used in conductive films, lubrification, nanofluids, catalysis, and also as potent antimicrobial agent.
Rubilar, Olga, Rai, Mahendra, Tortella, Gonzalo, Diez, Maria Cristina, Seabra, Amedea B., Duran, Nelson   +5 more
openaire   +4 more sources