Preparation method of nano silicon carbide reinforced aluminum-based composite material

A technology for strengthening aluminum-based and composite materials, which is applied in the direction of improving process efficiency and improving energy efficiency to achieve uniform distribution, excellent mechanical properties, and avoid agglomeration.

Inactive Publication Date: 2013-04-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Preparation method of nano silicon carbide reinforced aluminum-based composite material
  • Preparation method of nano silicon carbide reinforced aluminum-based composite material
  • Preparation method of nano silicon carbide reinforced aluminum-based composite material

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Experimental program
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Embodiment 1

[0022] Step 1: SiC powder with a particle size of 40nm-60nm is mixed with AlSi10Mg powder with a particle size of 15μm-30μm, wherein the content of SiC is 3wt%.

[0023] Step 2: Put the mixed powder above into a Pulverisette-6 single-pot planetary high-energy ball mill produced by Germany Fritsch Company for ball milling. During ball milling, stainless steel balls were used as the ball milling medium, and the ball-to-material ratio was 10:1; argon protection was used to prevent oxidation; the ball mill speed was 300r / min, and the ball milling time was 4h; 4wt% stearic acid (C 18 h 36 o 2 , analytically pure, white granular) as a process control agent (PCA); the ball milling process was carried out by ball milling for 20 minutes and air cooling for 10 minutes.

[0024] Step 3: The SiC / AlSi10Mg nanocomposite powder obtained by ball milling is used for SLM forming. The SLM forming system mainly includes: high-power YLR-200 fiber laser, protective atmosphere device, automatic p...

Embodiment 2

[0031] Step 1: SiC powder with a particle size of 40nm-60nm is mixed with AlSi10Mg powder with a particle size of 15μm-30μm, wherein the content of SiC is 6wt%.

[0032] Step 2: Put the mixed powder above into a Pulverisette-6 single-pot planetary high-energy ball mill produced by Germany Fritsch Company for ball milling. During ball milling, stainless steel balls were used as the ball milling medium, and the ball-to-material ratio was 10:1; argon protection was used to prevent oxidation; the ball mill speed was 300r / min, and the ball milling time was 5h; 4wt% stearic acid (C 18 h 36 o 2 , analytically pure, white granular) as a process control agent (PCA); the ball milling process was carried out by ball milling for 20 minutes and air cooling for 10 minutes.

[0033]Step 3: The SiC / AlSi10Mg nanocomposite powder obtained by ball milling is used for SLM forming. The SLM forming system mainly includes: high-power YLR-200 fiber laser, protective atmosphere device, automatic po...

Embodiment 3

[0040] Step 1: SiC powder with a particle size of 40nm-60nm is mixed with AlSi10Mg powder with a particle size of 15μm-30μm, wherein the content of SiC is 10wt%.

[0041] Step 2: Put the mixed powder above into a Pulverisette-6 single-pot planetary high-energy ball mill produced by Germany Fritsch Company for ball milling. During ball milling, stainless steel balls were used as the ball milling medium, and the ball-to-material ratio was 10:1; argon protection was used to prevent oxidation; the ball mill speed was 300r / min, and the ball milling time was 6h; 4wt% stearic acid (C 18 h 36 o 2 , analytically pure, white granular) as a process control agent (PCA); the ball milling process was carried out by ball milling for 20 minutes and air cooling for 10 minutes.

[0042] Step 3: The SiC / AlSi10Mg nanocomposite powder obtained by ball milling is used for SLM forming. The SLM forming system mainly includes: high-power YLR-200 fiber laser, protective atmosphere device, automatic ...

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Abstract

The invention discloses a preparation method of laser forming nano particle reinforced aluminum-based composite material, belonging to the technical field of particle reinforced aluminum-based composite materials. The method comprises the steps of: (1) selecting SiC powder with purity of more than 99.9% and granularity of 40-60 nanometers, and AlSi10Mg powder with purity of more than 99.9% and granularity of 15-30 micrometers; (2) mixing the powders, wherein the weight of the SiC powder is 3%-10% of the total weight of the mixed powder; (3) putting the mixed powder into a planetary high-energy ball mill for milling; (4) taking the milled powder for SLM forming; and (5) repeating the step (4) until a three-dimensional block sample is completed. According to the method provided by the invention, the aluminum-based composite material with uniform microscopic structures can be prepared.

Description

technical field [0001] The invention relates to the technical field of particle-reinforced aluminum-based composite materials; in particular, it relates to a preparation process of nano-particle-reinforced aluminum-based composite materials. Background technique [0002] Due to the advantages of excellent high-temperature mechanical properties, low thermal expansion coefficient, excellent wear resistance, simple preparation process, and low cost of reinforcements, particle-reinforced aluminum matrix composites have been widely used in aerospace, automotive, and microelectronics fields. Obtaining large-scale applications has gradually become the research focus of aluminum matrix composites. Due to the advantages of high specific strength and specific stiffness, fatigue resistance, low density and good dimensional stability, the SiC particle-reinforced aluminum matrix composite material has become an ideal and most promising structural material. It has been widely used in aero...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C32/00C22C1/05B22F3/105
CPCY02P10/25
Inventor 顾冬冬王泓乔戴东华张国全
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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