Method for preparing Ti3SiC2/SiC/Al composite material

A technology of composite materials and raw materials, applied in the field of preparation of Ti3SiC2/SiC/Al composite materials, to achieve the effect of improving strength and toughness, simple steps, and high energy consumption

Inactive Publication Date: 2017-05-10
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

No one has yet compared Al, Ti 3 SiC 2 Simultaneousl

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  • Method for preparing Ti3SiC2/SiC/Al composite material
  • Method for preparing Ti3SiC2/SiC/Al composite material
  • Method for preparing Ti3SiC2/SiC/Al composite material

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Example Embodiment

[0021] Ti of the present invention 3 SiC 2 / SiC / Al composite material preparation method, the method comprises the following steps:

[0022] 1) Preparation of Al-based alloy: The mass percentage of each element in the Al-based alloy is: Al, 60-80wt%; Ti, 5-20wt%; Cu, 0-10wt%; Si, 5-25wt%;

[0023] Weigh the corresponding raw materials according to the above-mentioned mass percentages of each element, place the Al ingot in a graphite crucible, and heat it to complete melting, then add titanium, silicon and copper into the molten aluminum, and heat up to 800-1100 ℃, keep the temperature, and stir until it is completely dissolved, that is, the molten Al-based alloy liquid is obtained;

[0024] 2) Treatment of SiC ceramics: Cut the raw materials of SiC ceramics into the required size with a diamond cutting machine; then grind the surface of SiC ceramics with a diamond grinding disc until the surface is smooth and without oxide layer; then use acetone and anhydrous ethanol in tur...

Example Embodiment

[0031] Example 1

[0032] This example Ti 3 SiC 2 The preparation method of / SiC / Al composite material is as follows:

[0033] 1) Preparation of Al-based alloy: the mass percentage composition of each element of the Al-based alloy is: Al, 70wt%; Ti, 15wt%; Cu, 5wt%; Si, 10wt%;

[0034] Weigh the corresponding raw materials according to the above-mentioned mass percentages of each element, each raw material is Al ingot, Ti ingot, Cu plate, Si block, 150g Al ingot is placed in a graphite crucible, heated to 700 ℃ in a box-type resistance furnace and kept until completely melted , then add 32gTi, 10.7g Cu, 21.4g Si to the molten aluminum, heat up to 900 ° C, the heating rate is 15 ° C / min, keep at this temperature for 60 min, stir until completely dissolved, That is, the Al-based alloy liquid in molten state is obtained;

[0035] Take out a small amount of the molten Al-based alloy liquid and cool it into an ingot, cut out 3mm×3mm×3mm alloy particles, and carry out the wettin...

Example Embodiment

[0043] Example 2

[0044] This example Ti 3 SiC 2 The specific steps of the preparation method of the / SiC / Al composite material are the same as those in Example 1, except that the infiltration time in this example is 6h.

[0045] According to the test and analysis process of Example 1, the composite material prepared in this example is analyzed and tested. The specific results are: after the three-point bending strength test, the average bending strength of the composite material prepared in this example is 413MPa, which is higher than that of the original SiC material. Ceramic (179MPa) increased by 234Mpa.

[0046] The results of XRD on the surface are as follows: Figure 5 As shown, the outer layer (at the interface) of the composite material of this example has a large amount of Ti 3 SiC 2 produced without TiC. The infiltration time is 6h, and Ti can still be obtained 3 SiC 2 / SiC / Al composite material, and Al can completely penetrate into SiC ceramics. Due to the ...

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Abstract

The invention relates to a method for preparing a Ti3SiC2/SiC/Al composite material. The method includes the following steps of 1) Al-based alloy preparing, wherein Al-based alloy is prepared from, by mass, 60 wt%-80 wt% of Al, 5 wt%-20 wt% of Ti, 0 wt%-10 wt% of Cu and 5 wt%-25 wt% of Si, a Al ingot is put into a graphite crucible and heated till the Al ingot is completely molten, then threes substances of titanium, silicon and copper are added into the molten aluminum, the temperature is increased to be 800 DEG C to 1,100 DEG C and kept, the product is stirred to be completely dissolved, and molten-state Al-based alloy liquid is obtained; 2) SiC ceramic treating; 3) infiltrating technology conducting, wherein SiC ceramic obtained after treating in the step 2) is soaked into the molten-state Al-based alloy liquid prepared in the step 1), the infiltrating temperature is 800 DEG C to 1,100 DEG C, the infiltrating time is 1 h to 10 h, a sample is taken out and cooled to be at the room temperature, and the Ti3SiC2/SiC/Al composite material is obtained. By means of the method, the toughness of the SiC-ceramic-based composite material can be remarkably improved, the defect that the Ti3SiC2/SiC/Al composite material only can be prepared under the harsh technical conditions such as the high temperature and the high vacuum in the prior art is overcome, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of ceramic matrix composite materials, specifically a Ti 3 SiC 2 / SiC / Al composite material preparation method. Background technique [0002] Ti 3 SiC 2 It is a ternary ceramic that combines the advantages of high melting point, high chemical stability, corrosion resistance, oxidation resistance of ceramics, and thermal conductivity, electrical conductivity, and easy processing of metals. With the Ti 3 SiC 2 attention to Ti 3 SiC 2 There are many studies on the preparation of powder and block, and Ti 3 SiC 2 / SiC composite material is relatively rare. So far, Ti 3 SiC 2 The preparation methods of / SiC composite materials mainly focus on two methods: powder hot pressing sintering of Ti-C-Si system and liquid silicon impregnation. Yin Hongfeng et al. (Yin Hongfeng, Fan Qiang, Ren Yun, etc. SiC content has an effect on Ti 3 SiC 2 / SiC composite material properties [J]. Journal of Aeronautical Ma...

Claims

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Application Information

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IPC IPC(8): C04B41/88C04B41/87
CPCC04B41/009C04B41/5057C04B41/5155C04B41/87C04B41/88C04B35/565C04B41/4523C04B41/4556
Inventor 马瑞娜王威曹晓明杜安范永哲赵雪
Owner HEBEI UNIV OF TECH
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