Self-lubricating behaviours of ceramic tools in dry cutting. (9th October 2006)

• Record Type: Journal Article
• Authors: Jianxin, Deng; Xuefeng, Yang; Jianhua, Liu
• Is Part Of: International journal of machining and machinability of materials. Volume 1:Number 2(2006)
• Page Start: 213
• Page End: 222
• Publication Date: 2006-10-09
• Subjects: ceramic cutting tools -- lubrication -- wear mechanisms -- dry cutting -- solid lubricants -- hot pressing -- self-lubrication -- self-tribofilms -- friction coefficient -- cutting speed -- tool-chip interface -- machining; Machining -- Periodicals; Metals -- Machinability -- Periodicals; 671.35
• Languages: English
• ISSNs: 1748-5711

Abstract

An in situ reaction self-lubricating ceramic tool (i.e. Al2 O3 /TiB2 ) and a self-lubricating ceramic tool with the addition of solid lubricants (i.e. Al2 O3 /TiC/CaF2 ) were produced by hot pressing. The lubricating behaviour of these self-lubricating tools in dry cutting processes were studied. It was shown that self-tribofilms, which contributed to the decrease of the friction coefficient at the tool-chip interface, were consistently formed on the tool rake surface for these self-lubricating tools. The formation process and composition of these self-tribofilms were determined and the self-lubricating mechanisms were advanced. Cutting speed was found to have a profound effect on the self-lubricating behaviours. These self-lubricating tools can be used to reduce the friction coefficient between the tool-chip interface during dry cutting.