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TiC/AI high-damp composite material and preparing method thereof

A composite material and preparation technology, which is applied in the field of high-damping composite materials and its preparation technology, can solve the problems of small contribution to the strength of graphite particle materials and the inability to realize the effective combination of structure and function materials, and achieve good wear resistance , low expansion coefficient, high specific strength effect

Inactive Publication Date: 2006-05-17
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After literature search, it was found that Cheng Hefa et al. published "Damping Properties of Gr / Al Composite Materials" in "Mining and Metallurgy Engineering" 2002, 22(2): 103-106. This article introduced the preparation of Gr / Al by pressurized seepage process Composite materials, the damping performance of the composite materials prepared by this method has reached the requirements of high damping materials under certain test conditions, but the addition of graphite particles has little contribution to the improvement of the strength of the material, and cannot well realize the structure-function material. effective combination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation composition is Cu5.3%, Ti0.15%, Mn0.3%, Cd0.25%, V0.3%, Zr0.2%, B0.06%, of which TiC0.1%, and the rest is Al for high damping Composite materials, the process is as follows:

[0019] After the aluminum ingot is melted, add KCl, NaCl, Na 3 AlF 6 Cover with covering agent, melt temperature reaches 900°C, add high-damping composite material prefabricated blocks that have been heat-preserved and dried at 250°C for 2 hours, and after the prefabricated blocks are completely melted, use a stirring device to stir at 400rpm for 10 minutes at a stirring temperature of 900°C . After adding Cu, Al-Ti, Al-Mn, Cd, V, Zr, B to adjust the chemical composition, after standing at 780°C for 10 minutes, pour it into the ingot mold to obtain the TiC / Al high damping composite material. The obtained composite material was cut into a damping sample of 50 mm × 5 mm × 1 mm, and the damping value Q of the prepared in-situ self-generated TiC / Al high damping composite material wa...

Embodiment 2

[0021] The preparation composition is Cu4.8%, Ti0.35%, Mn1%, wherein TiC10%, the rest is Al high damping composite material, the process is as follows:

[0022] After the aluminum ingot is melted, add KF and MgCl 2 Covered with KCl covering agent, the melt temperature reaches 790°C, add high damping composite material prefabricated blocks that have been heat-preserved and dried at 200°C for 3.5 hours, and after the prefabricated blocks are completely melted, stir with a stirring device at a stirring speed of 300rpm for 20min at a stirring temperature of 790°C. After adding Cu, Al-Ti, Al-Mn alloys to adjust the chemical composition, after standing at 730°C for 20 minutes, pour it into the ingot mold to obtain the in-situ self-generated TiC / Al high damping composite material. The obtained composite material was cut into a damping sample of 50 mm × 5 mm × 1 mm, and the damping value Q of the prepared high damping composite material was measured by DMTA -1 =9×10 -3 ~48×10 -3 ;...

Embodiment 3

[0024] The preparation composition is Cu4%, Ti0.2%, Mn0.6%, wherein TiC20%, the rest is Al high damping composite material, the process is as follows:

[0025] Add MgCl after the aluminum ingot is melted 2 、Na 2 SiF 6 , NaF covering agent, and the melt temperature reaches 680°C. Add high-damping composite material prefabricated blocks that have been heat-preserved and dried at 150°C for 5 hours. After the prefabricated blocks are completely melted, use a stirring device to stir at a speed of 200rpm for 30 minutes. The stirring temperature is 680°C. After adding Cu, Al-Ti, Al-Mn alloy to adjust the chemical composition, after standing at 680°C for 30 minutes, pour it into the ingot mold to obtain the TiC / Al high damping composite material. The obtained composite material was cut into a damping sample of 50 mm × 5 mm × 1 mm, and the damping value Q of the prepared high damping composite material was measured by DMTA -1 =10×10 -3 ~49×10 -3 ; Tensile strength at room tempera...

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Abstract

A TiC / Al high-damping composite material and a preparation process thereof belong to the field of materials. The composition weight percentage of the composite material of the present invention is composed of: Cu 4-5.3%, Ti 0.15-0.35%, Mn 0.3-1%, Cd 0-0.25%, V 0-0.3%, Zr 0-0.2%, B 0-0. 0.06%, of which TiC is 0.1-20%, and the rest is Al. The process of the present invention comprises the following steps: using a high-temperature vacuum reaction sintering method to synthesize a high-damping composite material prefabricated block containing TiC particles; adding aluminum ingots that are completely melted, covering the melt with a covering agent, and adding the dried high-damping composite material prefabricated block Stir after all the prefabricated blocks are melted; add Cu, Ti, Mn or Cu, Ti, Mn, Cd or Cu, Ti, Mn, Cd, V, Zr, B to adjust the chemical composition, and pour it into the ingot mold after standing still, that is Obtain in-situ self-generated TiC / Al high damping composite materials. The room temperature damping of the invention has reached the category of high damping materials, and its normal temperature tensile strength has been significantly improved, laying a good foundation for further development of structure-functional materials.

Description

technical field [0001] The invention relates to a high damping composite material and its preparation process, in particular to a TiC / Al high damping composite material and its preparation process. belongs to the field of materials. Background technique [0002] Compared with traditional metal materials, metal matrix composites have excellent properties such as high specific strength, specific stiffness, good wear resistance, and low expansion coefficient. Therefore, metal matrix composites are considered to have good application potential. For certain dynamic structures in the fields of aviation, aerospace, automobiles, and electronics industries, the vibration and noise need to be strictly controlled, which puts forward higher requirements on the damping performance of materials. The failure analysis statistics of rockets and satellites show that about three Two out of 10 failures are related to vibration and noise. Damping materials and technology are the most effective...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C32/00
Inventor 王浩伟厉松春马乃恒张亦杰李险峰
Owner SHANGHAI JIAOTONG UNIV
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