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Zirconia Toughened Alumina Zirconia Toughened Alumina (ZTA) is used in mechanical applications. It is considerably higher in strength and toughness than alumina. This is due to transformation toughening of zirconia when stress is applied (transforms tetragonal to monoclinic phase). Typical ZTA is 10% to 20% zirconia and 80 to 90% alumina. Due to the zirconia content, ZTA is more expensive than alumina but offers increased component life and performance. Microwave sintering of ZTA has been demonstrated at Ceralink. ZTA couples with microwave energy directly at elevated temperatures (above 800 ºC). Major uses of ZTA are in bearings, bushings, pump components, cutting tool inserts, wear components. Material: Ceramic |
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