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METHOD OF PRESSURELESS SINTERING PRODUCTION OF DENSIFIED CERAMIC COMPOSITES
METHOD OF PRESSURELESS SINTERING PRODUCTION OF DENSIFIED CERAMIC COMPOSITES
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机译:致密陶瓷复合材料的无压烧结生产方法
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摘要
Methods of making and compositions of dense sintered ceramic nano- and micro-composite materials that are highly stable in a variety of conditions and exhibit superior toughness and strength. Liquid feed flame spray pyrolysis techniques form a plurality of nanoparticles (e.g., powder), each having a core region including a first metal oxide composition comprising Ce and/or Zr or other metals and a shell region including a second metal oxide composition comprising Al or other metals. In certain aspects, the core region comprises a partially stabilized tetragonal ZrO2 and the shell region comprises an a-Al2O3 phase. The average actual density of the ceramic after sintering is greater than 50% and up to or exceeding 90% of a theoretical density of the ceramic.
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机译:致密烧结的陶瓷纳米和微复合材料的制造方法和组成,这些材料在各种条件下都非常稳定,并具有出色的韧性和强度。液体进料火焰喷雾热解技术形成多个纳米颗粒(例如粉末),每个纳米颗粒具有包括包含Ce和/或Zr或其他金属的第一金属氧化物组合物的核区域和包含包含Al或Al的第二金属氧化物组合物的壳区域。其他金属。在某些方面,核心区域包括部分稳定的四方ZrO 2,而壳区域包括α-Al2 O 3相。烧结后陶瓷的平均实际密度大于陶瓷理论密度的50%并且高达或超过陶瓷理论密度的90%。
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