Journal ArticleDOI
Synthesis of Nanograined Ti-Al-Cr-Nb-X [X = Ni-P-Coated Graphite and Carbon] Intermetallic Matrix Composites by Mechanical Alloying
TLDR
In this paper, the formation of TiAl (γ) and Ti3Al (α 2) phases were confirmed by x-ray diffraction after milling for 75h in case of graphite addition and 100h for carbon addition in the intermetallic matrix.Abstract:
In the present work, TiAl-based intermetallic matrix composite with second phase reinforcement as Ni-P-coated carbon and graphite powders were synthesized by mechanical alloying route. Graphite powder (20–30 µm) and elemental carbon powders (1–5 µm) were coated with Ni-P by the electroless coating technique, which was added to the elemental powder mixtures of Ti-48Al-1%Cr -1%Nb with 1% composition of either of the two. The powder mixtures were subjected to mechanical alloying at 300 rpm up to 250 h using toluene as a process control agent. The samples were collected after 25 h duration and characterized. The formation of TiAl (γ) and Ti3Al (α 2) phases are confirmed by x-ray diffraction. The formations of these phases were found after milling for 75 h in case of graphite addition and 100 h in case of carbon addition in the intermetallic matrix. The mechanically alloyed samples milled for different extents of time were examined by a field emission scanning electron microscope (FESEM) and energy dispersive ...read more
Citations
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Journal ArticleDOI
Design of light weight multi-layered coating of zinc oxide–iron–graphite nano-composites for ultra-wide Bandwidth microwave absorption
TL;DR: In this article, the authors focused on the formulation of suitable material combination for good microwave absorption with ultra-wide Bandwidth at minimum coating thickness, and a unique materials combination of semiconductor, conductor and magnetic materials has been specifically designed through a simple fabrication method to meet the necessity of enhanced absorption characteristics in the frequency range of 4.0-12.0 GHz.
Journal ArticleDOI
Wear characteristics of mechanically milled TiO2 nanoparticles incorporated in electroless Ni–P coatings
TL;DR: In this paper, Ni-P-TiO 2 nanocomposite coatings were developed using alkaline bath containing milled TiO 2 nanoparticles (4.g/l).
Journal ArticleDOI
A novel electroless plating of Ni–P–Al–ZrO2 nanocomposite coatings and their properties
TL;DR: In this article, the wear performance of electroless deposited Ni-P-Al-ZrO 2 nanocomposite coatings on mild steel was studied and the results showed that the nano-zirconium composites showed uneven sphericsl shape with particle size ranges from 30 to 40 nm.
Journal ArticleDOI
Physical and tribological characteristics of porous NiTi SMA fabricated by powder metallurgy
TL;DR: In this article, the mechanical and tribological properties of NiTi shape memory alloy (SMA) fabricated by powder metallurgy have been investigated and the wear behavior of the NiTi alloy has been determined by varying binder percentage.
Journal ArticleDOI
NiTi shape memory alloy: physical and tribological characterization
TL;DR: In this paper, the NiTi shape memory alloy (SMA) is processed with the help of powder metallurgy and the wear behavior of an SMA can be determined using the dry abrasion test, and the increase in binder content and rotational speed at constant load increases the wear rate of SMA alloys.
References
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Book
Mechanical Alloying And Milling
TL;DR: Mechanical Alloying (MA) is a solid-state powder processng technique involving repeated welding, fracturing, and rewelding of powder particles in a high-energy ball mill as mentioned in this paper.
Proceedings ArticleDOI
Mechanical Alloying and Milling
TL;DR: A brief review of the mechanical alloying questions focusing on the possible processes and apparatuses (mills) can be found in this article, with a focus on the possibility of using a mill.
Book
Liquid phase sintering
TL;DR: The use of liquid phase sintering has received increased attention as part of the growth in particulate materials processing as mentioned in this paper, which is attributed to an increased concern over energy utilization, a desire to better control microstructure in engineermg materials, the need for 1mproved material economy, societal and economic pressures for higher productivity and quality, requirements for unique property combinations for high performance applica- tions, and a desire for net shape forming.
Journal ArticleDOI
Processing of advanced materials using high-energy mechanical milling
TL;DR: An overview of the research on the use of high-energy mechanical milling in processing advanced materials can be found in this article, where the focus is on the major understanding achieved on each of the major topics in this area.
Journal ArticleDOI
Intermetallic alloys based on gamma titanium aluminide
TL;DR: In this paper, a great deal of effort has been made to improve these ductile properties through chemistry modification and microstructure control, and some success has met with some success.