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A kind of preparation method of continuous fiber reinforced carbon/carbon-molybdenum composite material

A carbon composite material, continuous fiber technology, applied in the field of carbon/carbon-molybdenum composite material preparation

Active Publication Date: 2016-01-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The preparation of continuous fiber reinforced carbon / carbon-molybdenum composites by CVI combined with spark plasma sintering (SPS) has not been reported in the relevant literature

Method used

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  • A kind of preparation method of continuous fiber reinforced carbon/carbon-molybdenum composite material
  • A kind of preparation method of continuous fiber reinforced carbon/carbon-molybdenum composite material
  • A kind of preparation method of continuous fiber reinforced carbon/carbon-molybdenum composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049](1) Lay molybdenum powder with a particle size of 50-100 microns evenly on each layer of non-weft cloth and net tire, and lay 12 layers of non-weft cloth and net tire layer by layer, and prepare carbon fiber prefabricated body by needle punching and hooking. The initial density of the preform is 1.00g / cm 3 , The mass fraction of molybdenum in the prefabricated body is 50%;

[0050] (2) Densify the preform to 1.20g / cm through CVI 3 , control the pyrolytic carbon microstructure of the matrix to rough layer structure pyrolytic carbon; machine it into a workpiece with a diameter of 40mm and a height of 10mm, put it into the graphite mold of the SPS furnace, and pre-press it with a force of 5KN to keep the surface of the sample smooth.

[0051] (3) Using SPS furnace, vacuumize to 10 -2 After Pa, the carbon / carbon-molybdenum composite material is rapidly heated to a temperature of 1800°C, then slowly pressurized to a pressure of 26MPa, the temperature rise rate is controlle...

Embodiment 2

[0054] (1) Lay molybdenum powder with a particle size of 50-100 microns evenly on each layer of non-weft cloth and net tire, and lay 15 layers of non-weft cloth and net tire layer by layer, and prepare carbon fiber prefabricated body by needle-punching. The initial density of the preform is 1.11g / cm 3 , The mass fraction of molybdenum in the prefabricated body is 55%;

[0055] (2) The preform is densified to 1.33g / cm by CVI 3 , control the pyrolytic carbon microstructure of the matrix to rough layer structure pyrolytic carbon; machine it into a workpiece with a diameter of 40mm and a height of 10mm, put it into the graphite mold of the SPS furnace, and pre-press it with a force of 5KN to keep the surface of the sample smooth.

[0056] (3) Using SPS furnace, vacuumize to 10 -2 After Pa, the carbon / carbon-molybdenum composite material is rapidly heated to a temperature of 1780°C, then slowly pressurized to a pressure of 27MPa, the temperature rise rate is controlled to be 130...

Embodiment 3

[0059] (1) Lay molybdenum powder with a particle size of 50-100 microns evenly on each layer of non-weft cloth and net tire, and lay 10 layers of non-weft cloth and net tire layer by layer, and prepare carbon fiber prefabricated body by needle-punching. The initial density of the preform is 1.25g / cm 3 , The mass fraction of molybdenum in the prefabricated body is 60%;

[0060] (2) Densify the preform to 1.50g / cm through CVI 3 , control the pyrolytic carbon microstructure of the matrix to rough layer structure pyrolytic carbon; machine it into a workpiece with a diameter of 40mm and a height of 10mm, put it into the graphite mold of the SPS furnace, and pre-press it with a force of 5KN to keep the surface of the sample smooth.

[0061] (3) Using SPS furnace, vacuumize to 10 -2 After Pa, the carbon / carbon-molybdenum composite material is rapidly heated to a temperature of 1820°C, and then slowly pressurized to a pressure of 25MPa, the temperature rise rate is controlled to be...

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Abstract

The invention discloses a preparation method of a continuous-fiber reinforced carbon / carbon-molybdenum composite material. The preparation method comprises the following steps: (1) scattering molybdenum powder on the surface of each carbon fiber felt and each carbon-fiber non-woven fabric on each layer uniformly to obtain carbon fiber felts with molybdenum powder and carbon-fiber non-woven fabrics with molybdenum powder, superposing the carbon fiber felts with molybdenum powder and the carbon-fiber non-woven fabrics with molybdenum powder layer by layer alternatively, and weaving to obtain a molybdenum containing carbon fiber preform; (2) putting the molybdenum containing carbon fiber preform obtained in the step (1) into a depositing furnace, and depositing with pyrolytic carbon to obtain a molybdenum containing carbon / carbon composite blank with pyrolytic carbon, wherein the pyrolytic carbon is in a coarse layered structure, and the temperature is controlled at 1,170-1,220 DEG C in the process of depositing with pyrolytic carbon; and (3) putting the molybdenum containing carbon / carbon composite blank into an SPS (spark plasma sintering) furnace, increasing the temperature to 1,750-1,850 DEG C, pressing, and preserving temperature and pressure under pressure to obtain the continuous-fiber reinforced carbon / carbon-molybdenum composite material.

Description

technical field [0001] The invention relates to a preparation method of a carbon / carbon-molybdenum composite material, in particular to a preparation method of a continuous fiber reinforced carbon / carbon-molybdenum composite material. Background technique [0002] Molybdenum is a refractory metal with a melting point of 2620°C. It has the advantages of small expansion coefficient, high electrical conductivity, high thermal conductivity, and acid and alkali corrosion resistance. It is widely used in aerospace, metallurgy, electrical, chemical and other fields. It is an indispensable Alternative strategic substances. However, as a metal material, molybdenum has a sharp decline in its mechanical properties at high temperatures when the temperature exceeds about 1000°C. The carbon / carbon composite material is an advanced composite material with carbon fiber reinforced carbon matrix, which has particularly excellent high-temperature mechanical properties. Its mechanical properti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83C04B35/622
Inventor 张福勤王星星郑吉祥刘怡黎炳前
Owner CENT SOUTH UNIV
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