Abstract
Recent developments in ceramic materials have introduced a variety of ceramic composites for many engineering applications including metal cutting. Ceria toughened alumina (CTA) ceramic composite cutting tool inserts were developed by sintering and subsequently hot isostatically pressing (hipping) the green compacts. The performance of hipped CTA ceramic cutting tool inserts was evaluated by conducting machining studies on C30 steel. For comparison, machining studies were also conducted using the hipped plain alumina ceramic cutting tool insert and a commercial Ti[C, N] mixed alumina ceramic cutting tool insert. The hipped CTA ceramic cutting tool insert exhibited better mechanical properties than that of the hipped plain alumina insert due to the higher densification achieved. The hipped CTA ceramic cutting tool insert showed better performance in its flank wear and surface finish of the machined workpiece than that of the hipped plain alumina ceramic cutting tool insert. The commercial Ti[C, N] mixed alumina ceramic cutting tool insert showed better performance in flank wear and surface finish than that of the hipped CTA ceramic cutting tool insert.
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