Investigation of tribological performance of B4C reinforced aluminium matrix composites için kapak resmi
Investigation of tribological performance of B4C reinforced aluminium matrix composites
Başlık:
Investigation of tribological performance of B4C reinforced aluminium matrix composites
Yazar:
Serkir, Sevgi, author.
Yazar Ek Girişi:
Fiziksel Tanımlama:
xii, 73 leaves: color illustraltions, charts;+ 1 computer laser optical disc.
Özet:
Aluminium, on account of its easy accessibility and superior metallic characteristics, has a wide variety of applications. Increasing demand on the use of aluminium in areas such as automobile, aviation and space industries which requires high performance has led to development of aluminium metal matrix composites. For this purpose, the ceramic reinforcing particles are mostly preferred to provide better mechanical and tribological properties than their conventional counterparts. In this study, aluminium metal matrix composite (AMC) reinforced with 5 wt.%, 10 wt.% and 15wt.% of B4C were fabricated using the powder metallurgy method. In order to obtain the optimum processing parameters necessary for efficient fabrication, several trials, at first place, were studied under different conditions by changing milling parameters such as milling time, milling medium, milling speed and process control agent, and sintering process parameters such as sintering time, sintering temperature. The production of composite powders was carried out using a planetary ball mill in a wet medium for 7 hours with 0.05 wt.% of stearic acid process control agent which helps to avoid contamination and cold welding of ductile Al particle. The milled powders were pressed at 314 MPa at RT and composite samples with a diameter of 30 mm and a height of 4 mm were obtained. The samples were sintered at 550, 575, 600 and 625ºC for one hour under argon atmosphere. The micro-structures of samples were analysed by scanning electron microscopy and the X-ray diffraction techniques. The wear behaviour of sintered composite samples with ball-on-disc dry wear tester and the mechanical behaviour of the samples with Vickers hardness test were investigated.
Yazar Ek Girişi:
Tek Biçim Eser Adı:
Thesis (Master)--İzmir Institute of Technology: Materials Science and Engineering.

İzmir Institute of Technology: Materials Science and Engineering--Thesis (Master).
Elektronik Erişim:
Access to Electronic Versiyon.
Ayırtma: Copies: