Phase transformation toughened zirconia (TTZ) doped with yttria or ceria has excellent properties such as higher order fracture toughness, thermal shock resistance and moderate hardness. With these qualities, they are able to exhibit machining performance comparable to cold-compacted Al2O3 cutting tools. With an addition of 20% aluminium oxide to TTZ, i.e. the composites of alumina and partially stabilised zirconia (PSZ) exhibit improved toughness, enhanced thermal shock resistance and hardness. The alumina and PSZ composite ceramic tools exhibit cutting performance better than TTZ tools and comparable to zirconia toughened alumina tools. © 1993.

Ramalingam Krishnamurthy

C. V. Gokularathnam

Alumina

CERIUM COMPOUNDS

Composite materials

Doping (additives)

Hardness

Machining

performance

Phase Transitions

Strength of materials

Toughening

Yttrium compounds

Zirconia

COMPOSITE CUTTING TOOLS

Fracture toughness

Thermal shock resistance

Ceramic cutting tools

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Machining performance of phase transformation toughened alumina and partially stabilised zirconia composite cutting tools

Journal of the European Ceramic Society

Zirconia toughened aluminas (ZTAs) with their enhanced transverse rupture strength and fracture toughness are more widely applicable and more productive than plain alumina ceramics and cermets in metal cutting applications. The development of Ce-transformation toughened zirconia (TTZ) based alumina ceramic-ceramic composite (ZTA) for machining applications has resulted in a cutting tool which can be used in a finishing operation even at relatively low cutting speeds, which is usually the range for carbide cutting tools. © 1995.

International Journal of Refractory Metals and Hard Materials

Development of alumina and Ce-TTZ ceramic-ceramic composite (ZTA) cutting tool

In the present work, the performances of TiAlN-, AlCrN- and AlCrN/TiAlN-coated and uncoated tungsten carbide cutting tool inserts are evaluated from the turning studies conducted on EN24 alloy steel workpiece. The output parameters such as cutting forces, surface roughness and tool wear for TiAlN-, AlCrN- and AlCrN/TiAlN-coated carbide cutting tools are compared with uncoated carbide cutting tools (K10). The design of experiment based on Taguchi’s approach is used to obtain the best turning parameters, namely cutting speed ([Formula: see text]), feed rate ([Formula: see text]) and depth of cut ([Formula: see text]), in order to have a better surface finish and minimum tool flank wear. An orthogonal array (L[Formula: see text] was used to conduct the experiments. The results show that the AlCrN/TiAlN-coated cutting tool provided a much better surface finish and minimum tool flank wear. The minimum tool flank wear and minimum surface roughness were obtained using AlCrN/TiAlN-coated tools, when [Formula: see text][Formula: see text]m/min, [Formula: see text][Formula: see text]mm/rev and [Formula: see text][Formula: see text]mm.

Journal of Advanced Manufacturing Systems

Comparative Evaluation of Performances of TiAlN-, AlCrN- and AlCrN/TiAlN-Coated Carbide Cutting Tools and Uncoated Carbide Cutting Tools on Turning EN24 Alloy Steel

CIRP Annals

Cutting Performance and Wear Characteristics of an Alumina-Zirconia Ceramic Tool in High-speed Face Milling

Journal	Journal of the European Ceramic Society
ISSN	09552219
Open Access	No