Effect of Substrate Surface Roughness on the Tribological Properties of DLC-H Coatings on Tappet Valve

Autor: André Paulo Tschiptschin, M.A. Ramírez, S. K. Kolawole, F.O. Kolawole, Luis Bernardo Varela, A. Kraszczuk

Publikováno v: Tribology in Industry, Vol 43, Iss 2, Pp 189-199 (2021)
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

DLC-H coatings are increasingly used in automobile engine application at high temperatures, especially the reduction of friction and wear in sliding contacts. It is therefore important to determine the best substrate surface roughness on which DLC-H

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f96e1ecf62e84203d641c893505a4c9
http://www.tribology.rs/journals/2021/2021-2/2021-2-02.html

Mineralogical characterization of Azara (Nigeria) barite ore

Autor: Thais Bortotti, Carina Ulsen, F.O. Kolawole, Maurício Guimarães Bergerman, S. K. Kolawole

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

The aim of this study is to characterize barite samples from Azara located in Nasarawa state, Nigeria, and determine their suitability for oil and gas applications. The mineralogy, chemical composition, morphology and specific gravity were determined

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d591992470dcb3cd0c44d4ed8684318a

Fracture Toughness and Strength of Bamboo-Fiber Reinforced Laterite as Building Block Material

Autor: S. K. Kolawole, O Olugbemi, ES Ajayi, Adebayo F. Owa, F.O. Kolawole

Publikováno v: Universal Journal of Materials Science. 5:64-72

Modern day building materials must be sustainable, cheap, environmental friendly, durable and available. Laterite reinforced with bamboo fiber was moulded into blocks to determine the compressive strength, flexural strength and fracture toughness usi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::22fc6aa63e4f0f4552aadc5599c54573
https://doi.org/10.13189/ujms.2017.050302

Comparison of Nigerian Barite Production with some Top Barite Producing Countries

Autor: S. K. Kolawole, F.O. Kolawole, Oluwamayowa Moses Olugbemi, Chioma Ifeyinwa Madueke

Publikováno v: FUOYE Journal of Engineering and Technology. 4

Barite is a very important industrial minerals used as weighting material in the petroleum industry. The nature of barite ores, geology of barite ores based on location were discussed. This paper presents top barite producing countries in the world,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::707720ac37f81b193c292b516041c70d
https://doi.org/10.46792/fuoyejet.v4i3.518

Deposition and characterization of molybdenum oxide (MoO3) nanoparticles incorporated diamond-like carbon coatings using pulsed-DC PECVD

Autor: F.O. Kolawole, M.A. Ramírez, S. K. Kolawole, André Paulo Tschiptschin, Luis Bernardo Varela

Publikováno v: Materials Letters. 278:128420

In this study a novel approach for the deposition of diamond-like carbon coating incorporated with molybdenum nanoparticles (DLC-Mo) thin film on tappet valve (metallic substrate) by incorporating MoO3 nanoparticles into DLC using pulsed-DC plasma en

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::368602aab3786b3401ecd5c0043f6c82
https://doi.org/10.1016/j.matlet.2020.128420