Eco-friendly materials are being developed as population change into more aware of the coincidental damage subordinated by synthetic materials. Research investigators have spoken a strong appetite to develop materials capable of replacing synthetic materials. As a result, there has been an increase in exigency for natural fibre-based composites in commercial applications in recent years. Natural fibres are long-lasting materials found in nature that have advantages like renewability, biodegradability, lightweight, high specific characteristics and low cost. To meet client needs in a timely manner, Within the framework of the product design process, the selection of materials should be finished, according to the concurrent engineering strategy. Due to competing requirements, Inappropriate material choice frequently causes untimely failures, which causes large losses. To deal with this objective, selection process of natural fibre for long lasting composites becomes significant. Hence, correct decision-making tool ought to be used. This paper focuses on selection of natural fibre by using CODAS technique. This technique plays a significant role in sensible managing. Since the selection of natural fibre among eight alternatives and six criteria, it was observed that Basalt is best natural for long lasting composites followed by flax and Kenaf respectively when compared with multi-objective optimization and ratio analysis (MOORA) technique.

Magnesium is a biodegradable metal that has potential in orthopaedics. It has several advantages over other metallic materials because it is biocompatible and degradable now being used for biomedical applications, including elimination of stress shielding effects, enhancing degradation properties and enhancing biocompatibility concern in vivo, eliminating the second surgery for implant removal. Bioabsorbable magnesium (Mg) and related alloys have been limited in their usage because of its lower corrosion resistance. Surface alteration and functionality, in addition to basic alloying, is an important technique to deal with Mg and its alloys' reduced corrosion resistance. Magnesium's rapid depreciation however is a double-edged sword because it's critical to match bone renewal to material corrosion. As a result, calcium phosphate coatings have been proposed as a way to slow down corrosion. There are various possible calcium phosphate phases and their coating methods and can give a few distinct properties to various applications. Despite magnesium's lower melting point and greater reactivity, calcium phosphate coatings require precise settings to be effective. Because of their toxicity, non-biodegradability, and much higher cost, the recently used inorganic conversion coatings are less appealing and their application is limited. Conversion coatings are a viable alternative technology that is based on a cost- effective, environmentally friendly, and biodegradable organic component. Surface chelating functional groups in these compounds allow them to link with the magnesium/surface hydroxide layer while also providing anchoring groups for the polymer topcoat. Nanoreservoirs with multilayer inhibitors for active self-healing corrosion resistance thrive in this environment. This study examines the organic conversion coatings for Mg and its alloys in depth.