Defence Materials and Stores Research and Development Organization

Kānpur, India

Defence Materials and Stores Research and Development Organization

Kānpur, India
SEARCH FILTERS
Time filter
Source Type

Kurahatti R.V.,Basaveshwar Engineering College | Surendranathan A.O.,National Institute of Technology Karnataka | Mordina B.,Defence Materials and Stores Research and Development Organization | Naik P.,Anjuman Institute of Technology and Management | Auradi V.,Siddaganga Institute of Technology
Tribology - Materials, Surfaces and Interfaces | Year: 2016

Three types of bismaleimide–carbon nanotubes (CNTs) nanocomposites were fabricated using two types of original multiwalled CNTs with different diameters and one amide functionalized CNTs. The influence of diameter, content and functionalization of CNTs on the flexural and dry sliding wear behaviour were measured with universal testing machine and pin-on-disc wear apparatus. The experimental results indicated that at 1.5 wt-%, the bismaleimide-functionalized MWCNTs exhibited highest flexural strength of 156 MPa which is increased by 164% as compared to the neat matrix, and lowest specific wear rate of 1.8 × 10−4 mm3 N−1 m−1 which is decreased by 90% as compared to the neat matrix. This was attributed to the dispersion of CNTs in the matrix and the filler-matrix adhesion and internal strength of the composite. © 2016 Informa UK Limited, trading as Taylor & Francis Group


Kurahatti R.V.,Basaveshwar Engineering College | Suredranathan A.O.,National Institute of Technology Karnataka | Kori S.A.,Basaveshwar Engineering College | Ramesh Kumar A.V.,Defence Materials and Stores Research and Development Organization | And 2 more authors.
Tribology - Materials, Surfaces and Interfaces | Year: 2011

Nanosized metal particle filled polymer composites are finding numerous tribological applications in recent years. In the present work, the matrix properties were investigated by introducing nickel nanoparticles (60-100 nm, filler content of 0?5-10 wt-%) into epoxy resin. The influence of these particles on friction and dry sliding wear behaviour was measured using a pin on disc wear set-up. The experimental results indicated that the coefficient of friction and the specific wear rate of epoxy resin can be reduced with a rather low weight fraction of Ni particles. The lowest specific wear rate of 0?6461024 mm3 N21 m21 (compared to neat resin's value of 2?261024 mm3 N21 m21) was observed for composites with the filler content of 0?5 wt-%. The reinforcement of Ni particles leads to improved mechanical properties of the epoxy composites. The results have been supplemented with scanning electron micrographs to help understand the possible wear mechanisms. © 2011 W. S. Maney & Son Ltd.


Mordina B.,Defence Materials and Stores Research and Development Organization | Tiwari R.K.,Defence Materials and Stores Research and Development Organization
Journal of Composite Materials | Year: 2013

The poly(ether ether ketone) micro/nanocomposite reinforced with N-(2-aminoethyl)-3-aminopropyl triethoxy silane treated micro- and nano-sized nickel and zirconia (0.5, 1, and 3 wt%) were prepared by melt mixing in a co-rotating twin screw extruder followed by test specimen fabrication in microinjection molding. The resulting nanocomposites with 3 wt% Ni and ZrO2 nanoparticles exhibit the maximum improvement in tensile and flexural strength as well as the modulus with respect to neat poly(ether ether ketone). The lowest specific wear rate of 17.6 × 10-4 mm3/N/m has been achieved with 3 wt% nano-Ni-filled composite in comparison to neat poly(ether ether ketone)'s value 191.5 × 10-4 mm3/N/m. The thermal stability of micro- and nano-particle reinforced poly(ether ether ketone) composites measured by thermogravimetric analysis found to be higher than the unfilled poly(ether ether ketone). © The Author(s) 2012 Reprints and permissions: sagepub.co.uk/journalsPermissions. nav.

Loading Defence Materials and Stores Research and Development Organization collaborators
Loading Defence Materials and Stores Research and Development Organization collaborators