Navegando por Autor "Iqbal, Javed"
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Artigo Novel synthesis of copper oxide on fabric samples by cathodic cage plasma deposition(Polymers for Advanced Technologies, 2019-11-11) Feitor, Michele Cequeira; Fernades, Fernanda; Rocha Filho, Edglay; Souza, Ivan; Nascimento, Igor; Sousa, Rômulo; Almeida, Edalmy; Costa, Thércio; Naeem, Muhammad; Iqbal, JavedThe fabrics with copper or copper oxide deposition are of considerable interest because of exceptional antibacterial properties, which are useable in medical, textiles, and hygiene applications. Unfortunately, the conventional techniques take long pro-cessing time, complex equipment, and combination of several processing steps (nano-particles synthesis and their deposition on fabrics). In this novel study, cathodic cage plasma deposition assisted with copper cathodic cage is used for the synthesis of the copper oxide on polyester and polyamide fabrics. For the enhancement of synthesis efficiency, the effect of cathodic cage lid thickness is also investigated. The samples are assessed by using scanning electron microscopy, elemental dispersive spectros-copy, and X‐ray photoelectron spectroscopy. It is found that using cathodic cage plasma deposition, fabrics can be successfully synthesized by the copper oxide with comparatively small treatment time, cost‐effectively, and environmentally friendly. Interestingly, cathodic cage plasma treatment is already proved to be working effec- tively on industrial scale; thus, it is predicted to be of noteworthy importance for fab- rics processing on large‐scale garments manufacturing and hospitals.Artigo Surface modification of M2 steel by combination of cathodic cage plasma deposition and magnetron sputtered MoS2-TiN multilayer coatings(Elsevier, 2020-02) Alves, Salete Martins; Libório, Maxwell Santana; Praxedes, G. B.; Lima, L. L. F.; Nascimento, Igor Oliveira; Sousa, R. R. M.; Naeem, Muhammad Salman; Costa, Thércio Henrique de Carvalho; Iqbal, JavedTitanium nitride (TiN) is a good choice for the improvement in surface hardness of high-speed steel. Unfortunately, it has low adhesion with substrate and exhibits high friction coefficient; as a result it does not provide sufficient protection against sliding wear in metal-to-metal contact. The adhesion problem can be removed by nitriding process, whereas friction coefficient can be reduced by solid lubrication coating. In this study, an attempt is made to synthesize TiN hard coating as well as solid lubrication coating of molybdenum disulfide (MoS2) using magnetron sputtering, along with substrate pre-treatment by cathodic cage plasma de- position using titanium cathodic cage. The cathodic cage plasma nitrided sample exhibits significantly higher surface hardness, which reduced by solid lubrication coating. The nitrided sample depicts the presence of ironnitrides, TiN and nitrogen diffused martensite phases, whereas coated samples shows the presence of MoS2 and TiN phases. The friction coefficient and machining temperature are dramatically reduced by lubrication coating. This study recommends that the use of cathodic cage plasma nitriding using titanium cathodic cage is beneficial for improved surface hardness, and addition of solid lubrication coating is beneficial for reducing the coefficient of friction and machining temperature by scarifying hardness. As, both the systems are already proven to be appropriate for industrial-scale uses, thus results from this study can be applied for industrial-scale application