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A zirconia-based high-temperature self-lubricating bulk material

A high-temperature self-lubricating, block material technology, applied in the field of zirconia-based high-temperature self-lubricating block materials to achieve excellent friction and wear properties

Active Publication Date: 2015-10-21
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the use temperature of the currently announced materials is mostly concentrated below 500°C, which is far from meeting the development of modern society. At present, there is an urgent need for a high-temperature wear-resistant material that can be used at a temperature of 800-1000°C.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A respectively weighs the mass percentage as BaF 2 62% and CaF 2 38% powder, ball milling and mixing, press the mixed reaction material in a metal mold with a pressure of 30MPa to form a reaction embryo; put the embryo into a graphite mold and sinter it in a vacuum hot-press furnace. The sintering temperature is 900°C. BaF was prepared under the condition of incubation for 30 minutes 2 -CaF 2 Block, crushed to get BaF 2 -CaF 2 Powder;

[0017] B respectively weighs the mole percentage as ZrO 2 97% and Y 2 o 3 3% powder, mechanically alloyed in high energy ball mill for 60 hours to prepare partially stabilized ZrO 2 ;

[0018] C respectively weighs the mass percent as Mo 10%, BaF 2 -CaF 2 5%, partially stabilized ZrO 2 For the remaining powder, ball mill and mix. Put the mixed powder into a graphite mold and sinter in a vacuum hot-press furnace. The sintering temperature is 1400°C, the temperature is kept for 30 minutes, and the ZrO is prepared under t...

Embodiment 2

[0022] A respectively weighs the mass percentage as BaF 2 62% and CaF 2 38% powder, ball milling and mixing, press the mixed reaction material in a metal mold with a pressure of 20MPa to form a reaction embryo; put the embryo into a graphite mold and sinter it in a vacuum hot-press furnace. The sintering temperature is 1000°C. BaF was prepared under the condition of holding for 20 minutes 2 -CaF 2 Block, crushed to get BaF 2 -CaF 2 Powder;

[0023] B respectively weighs the mole percentage as ZrO 2 97% and Y 2 o 3 3% powder, mechanically alloyed in a high energy ball mill for 30 hours to prepare partially stabilized ZrO 2 ;

[0024] C respectively weighs the mass percent as Mo 15%, BaF 2 -CaF 2 15%, partially stabilized ZrO 2 For the remaining powder, ball mill and mix. Put the mixed powder into a graphite mold and sinter in a vacuum hot-press furnace. The sintering temperature is 1200°C, the temperature is kept for 60 minutes, and the ZrO is prepared under ...

Embodiment 3

[0028] A respectively weighs the mass percentage as BaF 2 62% and CaF 2 38% powder, ball milling and mixing, press the mixed reaction material in a metal mold with a pressure of 20MPa to form a reaction embryo; put the embryo into a graphite mold and sinter it in a vacuum hot-press furnace. The sintering temperature is 1100°C. BaF was prepared under the condition of incubation for 10 minutes 2 -CaF 2 Block, crushed to get BaF 2 -CaF 2 Powder;

[0029] B respectively weighs the mole percentage as ZrO 2 97% and Y 2 o 3 3% powder, mechanically alloyed in a high energy ball mill for 50 hours to prepare partially stabilized ZrO 2 ;

[0030] C respectively weighs the mass percent as Mo 10%, BaF 2 -CaF 2 10%, partially stabilized ZrO 2 For the remaining powder, ball mill and mix. Put the mixed powder into a graphite mold and sinter in a vacuum hot-press furnace. The sintering temperature is 1300°C, the temperature is kept for 40 minutes, and the ZrO is prepared und...

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Abstract

The invention discloses a zirconium oxide-based high-temperature self-lubricating block material. The ZrO2-Mo-BaF2-CaFe2 high-temperature self-lubricating block material is prepared from partially stabilized powder such as ZrO2, Mo, BaF2 and CaFe2 through vacuum hot-pressing sintering. The density of the material is 6.00-6.30g / cm<3>, and the hardness of the material is 1200-900Mpa. The friction coefficient of the material is 0.24-0.45 in the range from a room temperature to 1000 DEG C, and the friction coefficient of the material is 0.24-0.32 in the range from 800 DEG C to 1000 DEG C. The zirconium oxide-based high-temperature self-lubricating block material has remarkable self-lubricating property and is used as a high-temperature wear resisting part.

Description

technical field [0001] The invention describes a zirconia-based high-temperature self-lubricating block material. Background technique [0002] The fierce competition in industrial sectors such as aerospace, transportation and energy has put forward more and more stringent requirements for the wear resistance, corrosion resistance, fatigue resistance and high temperature performance of materials. 1. When working under high-speed and heavy-load conditions, parts and components generally cannot be lubricated with lubricating oil and grease, but must use new solid lubricating materials. With the development of high-tech fields such as aerospace and nuclear energy, the problems of friction, wear and lubrication of materials under high temperature conditions have been paid more and more attention, and it is urgent to develop suitable high temperature self-lubricating materials. [0003] Chinese patent CN 102173716 A discloses a ceramic high temperature resistant friction materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/00C22C1/05C22C1/10C22C29/12
Inventor 毕秦岭刘维民孔令乾杨军
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI