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C.S. Ramesh

Bio: C.S. Ramesh is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Composite number & Nitride. The author has an hindex of 2, co-authored 3 publications receiving 32 citations.

Papers
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Journal ArticleDOI
30 Apr 1991-Wear
TL;DR: In this paper, the wear rates of nickel-fly ash composite coatings on mild steel have been measured for unlubricated rubbing against a rotating hardened steel disc, and wear losses of composite composites were lower than those of nickel coating.

22 citations

Journal ArticleDOI
30 Jul 1992-Wear
TL;DR: In this paper, a model for wear rates of polymer-based composites is applied to predict the wear rate of nickel-silicon nitride composite coatings under sliding conditions.

8 citations


Cited by
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Journal ArticleDOI
R.S Iyer1, J.A Scott1
TL;DR: In this paper, the use of fly ash as a value-added product beyond incorporation in construction materials is reviewed with the aim of looking at new areas that will expand the positive reuse of Fly Ash, thereby helping to reduce the environmental and economic impacts of disposal.
Abstract: The disposal of fly ash from coal-fired power stations causes significant economic and environmental problems. A relatively small percentage of the material finds application as an ingredient in cement and other construction products, but the vast majority of material generated each year is held in ash dams or similar dumps. This unproductive use of land and the associated long-term financial burden of maintenance has led to realization that alternative uses for fly ash as a value-added product beyond incorporation in construction materials are needed. Utilization of fly ash in such areas as novel materials, waste management, recovery of metals and agriculture is reviewed in this article with the aim of looking at new areas that will expand the positive reuse of fly ash, thereby helping to reduce the environmental and economic impacts of disposal.

347 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the wear and scratch properties of polymer nanocomposites is presented, focusing on their wear (in dry sliding and unlubricated conditions) and scratch damage, showing that it is not valid to assume that nano-fillers always improve wear/scratch (and friction) properties.
Abstract: It is realized that the addition of a small percentage of rigid nanoparticles to polymers significantly improves many of their mechanical properties, especially stiffness and strength. Such improvements are often attributed to the availability of large numbers of nanoparticles with huge interfacial areas compared to their macro- and micro-scale counterparts. In particular, from the tribological viewpoint, the small size of nanoparticles with homogenous dispersion in the matrix and good interfacial adhesion between nanoparticles and matrix are thought to be necessary requirements for a polymer nanocomposite. Material removal will be less since the nano-additives have similar sizes to the segments of surrounding polymer chains. Despite these positive effects due to the addition of nanoparticles, there are still some critical questions that are unanswered. Here, we review the fundamentals, recent progress and advances that have been made on the tribological aspects of polymer nanocomposites, particularly focusing on their wear (in dry sliding and unlubricated conditions) and scratch damage. The review shows that (a) it is not valid to assume that nano-fillers always improve wear/scratch (and friction) properties; and (b) material properties like modulus, hardness, fracture toughness or extent of wear rate or scratch penetration depth are not the sole indicators to compare and/or rank candidate materials. Several facets of wear/scratching or material response to the sliding processes require thorough understanding in order to determine parameters that control the surface integrity and material removal from polymer nanocomposites. This review also shows the apparent contradictions and false impressions on several material systems in many studies owing to poor characterizations of polymer nanocomposites and lack of quantitative descriptions of the observed phenomena.

249 citations

Journal ArticleDOI
TL;DR: In this article, a new class of copper based composite material by dispersing both hard and soft reinforcement in appropriate proportions to ensure optimum tribological characteristics was developed by liquid metallurgy route and the results show that the hybrid composites possess higher hardness, higher tensile strength, better wear resistance and lower coefficient of friction when compared to pure copper.

175 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present a review on the state-of-the-art in the utilization of industrial and agricultural waste materials for the development of metal-matrix composites (MMCs), providing an insight into the challenges and opportunities for the exploitation to their full potential.
Abstract: In this contribution, authors present a review on the state-of-the-art in the utilization of industrial and agricultural waste materials for the development of metal–matrix composites (MMCs), providing, through the judicious analysis of an ample and varied references source – from the oldest to the newest ones – an insight into the challenges and opportunities for the exploitation to their full potential. In addition to its topicality, the novelty of this contribution lies in the presentation of key statistical, technical, and property-related information of a comprehensive variety of waste materials classed into two main groups, namely, fly ash reinforced MMCs and MMCs derived from other waste materials. Although fly ash has been exploited in a broad range of applications, the attention paid for its use in the development of MMCs seems to be insufficient. A purposely designed chart helped to pinpoint the more demanding and profitable applications of fly ash, and establish strategic opportunity ar...

158 citations

Journal ArticleDOI
01 Jul 2005-Wear
TL;DR: In this paper, the authors investigated the wear performance of Alloy-Based Metal Matrix Composites (MMCs) by liquid metallurgy route and found that increased contents of TiO2 resulted in higher hardness and lower wear coefficient of composites under identical test conditions.

157 citations