5 Works

The evolution of brake friction materials: a review

Naveen Kumar, Ajaya Bharti, H.S. Goyal & Kunvar Kant Patel
Today, in the fast-moving world, the focus of all automobile companies is to increase the speed of vehicles to reduce travel time. With an increase in the speed of vehicles, there is an urgent need for the development of friction materials suitable for high-speed braking applications. A historical review of various materials used to date for making brake pads and brake drum/disc is done in the present work. Asbestos was the most suitable and widely...

Structural and magnetic properties of zinc doped nickel ferrite Ni(1−X)ZnXFe2O4 synthesized using sol-gel auto-combustion and hydrothermal methods

A. Nigam, D. Singh, A. Sinha, D. Sachan, Anisha , A. Vishal, D. Kumar & N.  Kumar
Zinc doped Nickel ferrites with chemical formula Ni(1−x)ZnxFe2O4 (x = 0.2, 0.4, 0.6, and 0.8) were synthesized using both Sol-gel auto-combustion and Hydrothermal methods. The synthesized powders were characterized for their physical and magnetic properties. The crystal structure and lattice parameter of these compounds were investigated by X-ray diffraction (XRD) and morphology has been confirmed by Scanning Electron Microscopy (SEM). The magnetic properties of after-calcined nanoparticles were measured at room temperature using a vibrating sample...

Effect of Ti reinforcement on the wear behaviour of AZ91/Ti composites fabricated by powder metallurgy

Naveen Kumar, Ajaya Bharti & Akhilesh Kumar Chauhan
The low corrosion and wear resistance of magnesium limit its industrial applications despite its very high strength to weight ratio and environment-friendly nature. Researchers are working on the development of high wear-resistant magnesium matrix composites. Different types of reinforcements (i.e., B4C, SiC, carbon nanotubes, graphite, Ti, etc.) are added to the magnesium matrix to enhance wear resistance. Still, metallic reinforcement titanium is most suitable because the addition of Ti increases wear resistance without compromising mechanical...

EFFECT OF PROCESS PARAMETERS ON THE CRYSTAL-PARAMETERS OF Cu-Zn SPINEL-FERRITES

Naveen Kumar, Ajaya Bharti, Abhishek Kumar & Abhishek Nigam
Spinel ferrite nano-powders are highly useful in applications such as drug-delivery, ferrofluids, gas sensors, etc. because of their semiconductor and ferromagnetic properties. There are various methods by which the spinel ferrites can be synthesized, i.e., hydro-thermal route, solid-state route, sol-gel route, thermal deposition route, mechanical milling, etc. In this work, nano-crystalline Cu-Zn ferrites with the composition of (Cu0.4Zn0.6Fe2O4) were synthesized from metal nitrate and acetate precursors by the hydro-thermal route and sol-gel auto-combustion route. Citric...

STRUCTURAL AND MAGNETIC PROPERTIES OF ZINC DOPED COPPER FERRITE SYNTHESIZED BY SOL-GEL AND HYDROTHERMAL ROUTE

Naveen Kumar, Deepak Singh, Abhishek Nigam, Omprakash Rajpoot, Mayank Kumar, Yadav , Yogendra Pratap Singh, P. Shakti Prakash & Samarjit Singh
In this work, Cu-Zn spinel ferrites having chemical formula Cu(1-x)ZnxFe2O4 for x ranging from 0.2 to 0.8 were synthesized by sol-gel auto-combustion method and hydrothermal method with a step size of 0.2. The effect of Zn doping on structural properties, crystallite size, and magnetic properties synthesized by both methods are reported. Rietveld refinement of the XRD patterns was analyzed using Maud for the determination of crystallite size. The X-ray diffraction pattern shows that single phase...

Registration Year

  • 2021
    5

Resource Types

  • Text
    5

Affiliations

  • Motilal Nehru National Institute of Technology
    5