Zirconia ceramic matrix composite and preparation method thereof

A technology for zirconia ceramics and composite materials, which is applied in the field of zirconia ceramic matrix composites and their preparation, can solve the problems of reducing the high temperature performance and chemical stability of ceramics, high cost, and low toughness of ceramic materials, and achieves low oxidation resistance. , Wide application prospects, excellent high temperature mechanical effect
CN101565306AInactive Publication Date: 2009-10-28UNIV OF JINAN
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF JINAN
Publication Date
2009-10-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a zirconia ceramic matrix composite and a preparation method thereof. In the composite, tetragonal zirconia is used as a substrate, and a Nb-Ti-Cr phase is used as a toughening phase, wherein the substrate and the toughening phase account for 20 and 80 volume percent of the total volume of the composite respectively and a sum of the volume percentages of the substrate and the toughening phase is 100 percent. Nb powder, Ti powder and Cr powder are mixed according to the mass ratio of Nb atoms to Ti atoms to Cr atoms of 50:37:23. The preparation method of the zirconia ceramic matrix composite comprises the following steps: ball milling the substrate and the toughening phase and mixing the mixture obtained after ball milling; and preparing the zirconia ceramic matrix composite by hot pressed sintering the mixture under vacuum. The composite of the invention has excellent high-temperature mechanical property and antioxygenic property as well as low cost; and compared with fiber and whisker toughened ceramic, the zirconia ceramic matrix composite has a similar toughening effect, but has simple preparation process, low cost and far more excellent conductivity.
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Description

technical field

[0001] The invention relates to a zirconia ceramic-based composite material and a preparation method thereof, belonging to the technical field of zirconia-based ceramic materials. Background technique

[0002] Tetragonal zirconia (TZP) ceramics is a material with the highest room temperature mechanical properties among ceramic materials. In addition to the inherent brittleness of ceramic materials, the strength and toughness of TZP materials decrease sharply with the increase of temperature. In addition, the disadvantages of low-temperature aging and poor thermal shock resistance have greatly weakened its competitive advantage and limited its scale development and application. The intrinsic brittleness of ceramics determines that the toughening of ceramic materials has become a core issue in ceramic research. At present, the toughening methods of ceramics mainly include phase transformation toughening, fiber (whisker) toughening, particle toughening and compo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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