The influence of graphite content and milling time on hardness, compressive strength and wear volume of copper-graphite composites prepared via powder metallurgy
Other Title(s)
تأثير محتوى الكرافيت و زمن الطحن على الصلادة، مقاومة الانضغاط، حجم البلى لمتراكبات النحاس-كرافيت المحضرة بواسطة ميتالورجيا المساحيق
Joint Authors
Mahdi, Faruq Mansur
Razzuqi, Raid Najib
Arhayyim, Sayf Sabah
Source
Tikrit Journal of Engineering Sciences
Issue
Vol. 24, Issue 3 (30 Sep. 2017), pp.47-54, 8 p.
Publisher
Tikrit University Colleg of Engineering
Publication Date
2017-09-30
Country of Publication
Iraq
No. of Pages
8
Main Subjects
Abstract EN
Copper – graphite composites are widely used in sliding bearings and brushes due to their excellent thermal and electrical conductivities and high wear resistance.
The aim of this research is to study the Influence of graphite content and milling time on hardness, compressive strength, wear volume and friction coefficient of copper - graphite composites prepared via powder metallurgy.
A powder mixture containing 0,5,10,15,20 and 25 vol% graphite was milled for 1,3,5,7 and 9 hours.
The milled mixture was cold pressed at 700 MPa for 30 second, followed by sintering at 900 oC for one hour.
It was found through this work that increasing milling time results an appreciate increase in hardness and radial compressive strength, slight reduction in wear volume and slight increase in the coefficient of friction for all compositions except that for pure copper in which a considerable increase in wear volume and decrease in the coefficient of friction was observed.
On the other hand, increasing the graphite volume fraction increases the composite hardness, till an optimum value, and decreases the radial compressive strength.
A great decrease in both wear volume and coefficient of friction was observed on increasing graphite content up to 25 vol%.
Finally, a graphite, cast iron chips and fireclay sintering configuration was found to be an effective procedure which minimize oxidation to levels comparative with those observed previously by sintering in argon or hydrogen atmospheres.
American Psychological Association (APA)
Mahdi, Faruq Mansur& Razzuqi, Raid Najib& Arhayyim, Sayf Sabah. 2017. The influence of graphite content and milling time on hardness, compressive strength and wear volume of copper-graphite composites prepared via powder metallurgy. Tikrit Journal of Engineering Sciences،Vol. 24, no. 3, pp.47-54.
https://search.emarefa.net/detail/BIM-946139
Modern Language Association (MLA)
Mahdi, Faruq Mansur…[et al.]. The influence of graphite content and milling time on hardness, compressive strength and wear volume of copper-graphite composites prepared via powder metallurgy. Tikrit Journal of Engineering Sciences Vol. 24, no. 3 (2017), pp.47-54.
https://search.emarefa.net/detail/BIM-946139
American Medical Association (AMA)
Mahdi, Faruq Mansur& Razzuqi, Raid Najib& Arhayyim, Sayf Sabah. The influence of graphite content and milling time on hardness, compressive strength and wear volume of copper-graphite composites prepared via powder metallurgy. Tikrit Journal of Engineering Sciences. 2017. Vol. 24, no. 3, pp.47-54.
https://search.emarefa.net/detail/BIM-946139
Data Type
Journal Articles
Language
English
Notes
Record ID
BIM-946139