TY  - JOUR
T1  - Influence of Cubic Boron Nitride on the Physical and Mechanical
Properties of NAB Alloy Prepared by Powder Matallurgy
AU - Jaafar, Alaa H. AU - Al-Ethari, Haydar 
JO  - Journal of Engineering and Applied Sciences
VL  - 13
IS  - 4
SP  - 874
EP  - 879
PY  - 2018
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2018.874.879
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2018.874.879
KW  - CBN
KW  -NAB
KW  -powder metallurgy
KW  -elastic properties
KW  -density
KW  -porosity
KW  -hardness
AB  - This study focuses on the influence of Cubic Boron Nitride (CBN) particles as reinforcement additive
on the properties of Nickel Aluminum Bronze (NAB) alloy of composition Cu-9Al-5Ni-4Fe prepared by powder
metallurgy technique. The compact pressure was determined as 700 MPa and the green samples sintered at
930°C for 90 min in vacuum high temperature tube furnace, then heat treated by quenched from 900°C in cold
water and tempered at 500°C for 30 min. Cubic boron nitride particles of 0.5, 1, 1.5 and 2 as weights percentage
were added as reinforcement particles to the alloy. The influence of the CBN particles on physical, mechanical
and elastic properties of the base alloy had been investigated to achieve that the tests included are: XRF test,
particle size test, XRD analysis, optical microscope analysis, hardness test, compression test, porosity test,
ultrasonic test, thermal conductivity test and coefficient of thermal expansi on test. The study showed that the
addition of 1.5 wt.% of boron nitride particles has the preferable effect on the mechanical properties where such
addition could increase hardness by 59% and compression strength by 16.03%. Experimental results showed
that such addition could also increase the elastic properties and porosity and decreased the density, thermal
conductivity and coefficient of thermal expansion.
ER  -