• Farooq, Umar
• Zaman, Atteeq Uz
• Shehbaz, Tauheed
• Zaman, Fatima
• Khan, Awais
• Khan, Muhammad Moheen
• Karim, Muhammad Ramzan Abdul

Abstract

<jats:p>In this work, pure nickel was reinforced with various contents of h-BN (4 &amp; 8wt.%) and SiC (2, 4, 6 &amp; 8wt.%) prepared via PM route. The synergistic effect of h-BN and SiC on mechanical and microstructural behaviour was investigated. The microstructure and crystal structure were characterized by scanning electron microscope and X-ray diffractometer. The density and microhardness were eveluated via He pycnometer and microhardness tester. SEM results revealed that the exfoliation reduced the particle size of h-BN from approximately 105 nm to 30-40 nm. Furthermore, the addition of h-BN and SiC improved the mechanical properties of the composite. The maximum hardness value of 420 HV was obtained for Ni-8BN-6SiC. This improvement in hardness was attributed to uniform dispersion and high hardness of h-BN and SiC. However, more addition of SiC (&gt;6 wt.%) deteriorated the hardness of the composite due to generated porosity.</jats:p>

Topics

• density
• dispersion
• nickel
• scanning electron microscopy
• nitride
• composite
• hardness
• Boron
• porosity