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Oxide ceramic/BaxSrl-xSO4 ceramic composite material and preparation method thereof

A baxsr1-xso4, oxide ceramic technology is applied in the field of oxide-based ceramic composite materials and their preparation, which can solve the problems of high sintering temperature, high friction coefficient and high wear rate in the preparation process, and achieves low friction coefficient and low friction and wear. Good performance and low energy consumption

Inactive Publication Date: 2012-06-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing oxide ceramic composite material has a large friction coefficient at a wide temperature range from room temperature to 760°C, a large wear rate at a high temperature of 760°C, and a high sintering temperature in the existing preparation process. The present invention provides An oxide ceramic / Ba x S r1-x SO 4 Composite material and its preparation method

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  • Oxide ceramic/BaxSrl-xSO4 ceramic composite material and preparation method thereof
  • Oxide ceramic/BaxSrl-xSO4 ceramic composite material and preparation method thereof
  • Oxide ceramic/BaxSrl-xSO4 ceramic composite material and preparation method thereof

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specific Embodiment approach 1

[0012] Specific implementation mode 1: In this implementation mode, an oxide ceramic / Ba x Sr 1-x SO 4 The composite material is composed of 50-90% oxide ceramic phase and 10-50% Ba x Sr 1-x SO 4 Phase composition, where Ba x Sr 1-x SO 4 In 0<x<1.

[0013] Oxide ceramics / Ba of this embodiment x Sr 1-x SO 4 The composite material has a very low friction coefficient in the wide temperature range from room temperature to 760 ° C. The friction coefficient at room temperature is 0.10 to 0.25, and the friction coefficient is less than 0.3 at 760 ° C. The wear rate at 760 ° C is significantly reduced. at 10 -6 mm 3 / N·m order of magnitude.

specific Embodiment approach 2

[0014] Embodiment 2: This embodiment differs from Embodiment 1 in that oxide ceramics / Ba x Sr 1-x SO 4 The composite material is composed of 50-60% oxide ceramic phase and 40-50% Ba x Sr 1-x SO 4 phase composition. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0015]Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the oxide ceramics are partially stabilized zirconia and alumina-reinforced zirconia, alumina or zirconia-toughened alumina ceramics. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

[0016] The oxide ceramic powders in this embodiment are all commercially available products.

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Abstract

The invention discloses an oxide ceramic / BaxSrl-xSO4 ceramic composite material and a preparation method thereof, which relate to an oxide ceramic composite material and a preparation method thereof and solve the problem that the conventional oxide ceramic material has large friction coefficient from the room temperature to a wide area temperature of 760 DEG C and has large abrasion rate at the high temperature of 760 DEG C and the conventional preparation process has high sintering temperature. The ceramic composite material of the invention consists of a ceramic composite material phase anda BaxSrl-xSO4 phase. The method of the invention comprises the following steps: ball milling and wet mixing, drying and sieving; filling fine powder into a graphite jig, and cold-pressing treatment; and obtaining the oxide ceramic / BaxSrl-xSO4 composite material through discharge plasma sintering. The friction coefficient of the ceramic composite material of the invention is less than 0.3 from theroom temperature to the wide area temperature of 760 DEG C, the abrasion rate at the high temperature of 760 DEG C is in the order of magnitude of 10 to 6 mm3 / N.m, and the preparation process of the invention has low sintering temperature.

Description

technical field [0001] The invention relates to an oxide-based ceramic composite material and a preparation method thereof. Background technique [0002] Oxide ceramics (alumina, partially stabilized zirconia and alumina reinforced zirconia, zirconia toughened alumina ceramics) are traditional structural ceramics with high hardness, high strength, low density, high stiffness, and excellent chemical stability , its application in the aerospace field can reduce the structural weight of structural materials, improve the structural efficiency of aircraft, improve the service reliability of structural materials and prolong the life of structural materials. Oxide ceramics play an extremely important role in the development of aerospace fields . However, the friction coefficient and wear rate of the new structural ceramics of oxide ceramics are very high at high temperatures, which limits its application in high-temperature service structural parts to a certain extent. [0003] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/01C04B35/48C04B35/10C04B35/622
Inventor 欧阳家虎李玉峰梁雪松刘占国周玉
Owner HARBIN INST OF TECH