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Ceramic and Glass Fibre Reinforced Flexible Composites for Particulate Filter Walls – A Novel Approach

Prabu K., Srinivasan J., Prakash C.

Fibres & Textiles in Eastern Europe

2019

Vol. 27, no. 3 (135)

91--97

Flexible composites from high performance fibres were developed and targeted to replace the wall of existing rigid ceramic Particulate Filters. The composites are made from E Glass fibre webs of different density in the middle, with standard SiC Ceramic fibres webs in in the outer layers, forming a sandwich structure. Different needling densities were applied to form nonwoven composites, and they were stitched diagonally on the surface at specified intervals with continuous glass fibre filament yarn. In total, nine novel flexible composites were developed and evaluated for their structural, surface, mechanical and thermal properties. Based on the results and statistical analysis, the B2 sample is considered to be taken for further research to develop Particulate Matter (PM) filters.

W pracy opracowano giętkie kompozyty wzmocnione włóknami ceramicznymi i szklanymi do zastosowania w ścianach filtrów cząstek stałych. Kompozyty tworzące strukturę wielowarstwową zostały wykonane ze wstęg z włókna szklanego o różnej gęstości (warstwa wewnętrzna) i włókien ceramicznych (warstwa zewnętrzna). Zastosowano różne gęstości igłowania w celu utworzenia kompozytów włókninowych i zszyto je ukośnie na powierzchni w określonych odstępach za pomocą ciągłej przędzy z włókna szklanego. Opracowano dziewięć nowych giętkich kompozytów i oceniono ich właściwości: strukturalne, powierzchniowe, mechaniczne i termiczne. Na podstawie wyników i analizy statystycznej stwierdzono, że do dalszych badań w celu opracowania filtrów materii cząstek stałych (PM) należy wytypować próbkę B2.

Analysis of tribological properties of lubricating gear oil with nano silica particles

Prabu K., Nalini B., Suresh B., Sekar M.

Journal of Achievements in Materials and Manufacturing Engineering

2016

Vol. 79, nr 2

59--65

Purpose: Lubricants prepared with metal oxide nanoparticle additives are found to have better tribological properties. In this work the widely used commercial SN lubricating oil is added with SiO2 nanoparticle and the tribological characteristics are studied. Wear tests were conducted on plain oil and oil with nanosized silica (SiO2) additives using a four ball tribo-tester. Design/methodology/approach: The wear images of the ball specimens were analyzed using confocal microscope to measure the topography of the wear parameters such as wear scar diameter, depth of wear, angle of the wear. Findings: It is found that the gear oil with silica nanoparticles is found to have improved properties. Results show a considerable reduction in the values of wear scar diameter, wear angle and wear depth for the gear oil added with SiO2 nanoparticles of 0.4 wt. %. Originality/value: In the work carried out, a new innovative technological approach to analyze the tribological properties of lubricating oil by finding the wear scar diameter, wear angle and wear depth is reported.