The effect of sintering temperature on Cu-CNTs nano composites properties produced by PM method

Abstract

In this research work, copper and CNTs have been processed using high energy milling in different milling times (5, 10 and 15 hours). FESEM and XRD have been used to characterize the milled powders. The FESEM micrographs of the milled powders indicated that the morphology of powders changed from spherical shape to flake as milling time increased. The effect of sintering temperature as well as CNTs content on the properties of Cu-CNTs nanocomposite has been investigated. The optimum sintering temperature to produce Cu-CNTs nanocomposites is determined to be 900 o C. The microstructure and phase analysis of Cu-CNTs nanocomposites were studied by field emission scanning electron microscopy and X-ray diffraction. Mechanical properties of nanocomposite samples at various sintering temperatures were investigated. Cu-CNTs nanocomposite with 4 vol.% CNTs fabricated by powder metallurgy method indicated the highest value of the microhardness and bending strength as compared to pure copper.

Microstructural and Mechanical Properties of Ti3SiC2-CNF Composite Materials by PM

“…By increasing the sintering temperature, both experimental and relative densities were significantly increased. At higher sintering temperatures, a denser structure was formed due to higher diffusion rates [30][31][32]. [35,36].…”

Powder metallurgy and hardness of the Ll-10Mg alloy reinforced with carbon nanotubes

“…Moreover, a good dispersion of CNTs is challenging to reach because of its high aspect ratio [24]. To overcome this disadvantage, more excellent dispersion and adherence methods require mechanical milling, ultrasound, magnetic stirring, and the modification of the surface energy of CNTs [25,26].…”

“…Several investigations have concluded that MA is a valuable technique for the homogeneous dispersion of CNTs in the metal matrix [24,25,30]. However, MA provokes possible damage to CNTs, and mixing at the molecular level leads to an interface [24].…”

Cost analysis of T6 induction heat treatment for the aluminum-copper powder metal compacts

“…P/M compacts are produced by mixing pure or alloy powders, being compressed within a mould and being heated in order to allow the metal powders to form a metallurgical bond [3]. Sintering [4,5] is the method of producing components, of which density can be kept under control, and of which resistance & integrity are formed through the implementation of thermal energy to the metal powders in a temperature under the fusion temperature. When thermal energy is applied on compressed metal powder, the component condensates, and the average particle size level increases; this condensation and the increase in the particle size is named as sintering [6].…”