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Method for preparing silicon carbon particulate reinforced composite material containing silicon-aluminum alloy by using crystalline silicon cutting waste

A technology of silicon carbide particles and cutting waste, which is applied in the field of preparing silicon carbide particle-reinforced silicon-containing aluminum alloy composite materials, which can solve the problems of high process operation cost, general performance of composite materials, and large silicon carbide particles, so as to make full use of resources , Large surface area, high activity effect

Inactive Publication Date: 2014-03-26
XINJIANG JOINWORLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the existing process of preparing silicon carbide particle-reinforced silicon-containing aluminum alloy composite materials, the silicon carbide particles used are large and poorly dispersed, and the performance of the prepared composite material is In general, reducing the particle size of silicon carbide will increase the cost; the silicon added to the alloy has lower purity and larger particles, and in a specific aluminum-silicon alloy, it is necessary to prepare an aluminum-silicon master alloy. , power consumption, process operation process and other aspects of high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The crystalline silicon cutting waste with 90% silicon carbide and 8% silicon (wt%) is selected, which conforms to Al99.85075 in GB / T 1196-2002 as the raw material for implementation.

[0034] (1) Pretreat the cutting material: the hydrogen ion concentration in the pickling solution is c(H+)=0.01mol / L, the liquid-solid ratio is 5:1, the pickling temperature is 40°C, the pickling time is 1 hour, and the stirring speed is 100 rev / min. After the pickling exothermic reaction is finished, when the temperature drops to room temperature, add 1% hydrofluoric acid accounting for the mass percentage of the pickling liquid, the concentration of hydrofluoric acid is 0.5% (mass percentage), and continue pickling for 15 minutes.

[0035] After conventional filtration, washing with water, and drying, argon protection was introduced during the drying process. The argon flow rate was 50mL / min, and the heating rate was 1°C / min to 80°C, and dried at this temperature for 3 hours to obtain ...

Embodiment 2

[0042] The crystalline silicon cutting waste with 95% silicon carbide and 4% silicon (wt%) is selected as the raw material for implementation in accordance with Al99.85075 in GB / T 1196-2002.

[0043] (1) Pretreat the cutting material: the hydrogen ion concentration in the pickling solution is c(H+)=0.1mol / L, the liquid-solid ratio is 3:1, the pickling temperature is 50°C, the pickling time is 3 hours, and the stirring speed is 150 rev / min. After the pickling exothermic reaction is completed, when the temperature drops to room temperature, add 1% hydrofluoric acid accounting for the mass percentage of the pickling liquid, and the concentration of hydrofluoric acid is 0.5% (mass percentage), and continue pickling for 20 minutes.

[0044] After conventional filtration, washing with water, and drying, argon protection was introduced during the drying process. The argon flow rate was 80mL / min, and the heating rate was 2°C / min to 90°C, and dried at this temperature for 4 hours to ob...

Embodiment 3

[0051] The crystalline silicon cutting waste with 95% silicon carbide and 4% silicon (wt%) is selected as the raw material for implementation in accordance with Al99.85075 in GB / T 1196-2002.

[0052] (1) Pretreat the cutting material: the hydrogen ion concentration in the pickling solution is c(H+)=0.08mol / L, the liquid-solid ratio is 3:1, the pickling temperature is 50°C, the pickling time is 1.5 hours, and the stirring speed is 130 rev / min. After the pickling exothermic reaction is finished, when the temperature drops to room temperature, add 1% hydrofluoric acid accounting for the mass percentage of the pickling liquid, the concentration of hydrofluoric acid is 0.5% (mass percentage), and continue pickling for 30 minutes.

[0053] After conventional filtration, washing with water, and drying, argon protection was introduced during the drying process. The argon flow rate was 60mL / min, and the heating rate was 2°C / min to 90°C, and dried at this temperature for 3.5h to obtain ...

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Abstract

The invention belongs to the technical field of the comprehensive utilization of secondary resource and particularly relates to a method for preparing a silicon carbon particulate reinforced composite material containing silicon-aluminum alloy by utilizing crystalline silicon cutting waste. The method comprises the following steps: firstly, pickling the crystalline silicon cutting waste to remove impurities such as iron oxide, metal impurities and a small amount of silicon dioxide in cutting waste, washing with water, filtering and drying to obtain a mixed micro-powder of silicon carbide and silicon with the particle size in the range of 0.5-10 mu m, mixing the silicon carbide micro-powder which accounts for 4.5-32.5% of the total mass fraction of the composite material and free silicon which accounts for 0.2-9.8% of the total mass fraction of the composite material with aluminum or aluminum alloy, performing strong stirring at a high temperature until silicon carbide is evenly dispersed and silica powder is dissolved, and rapidly solidifying to obtain the final product. The silicon carbide and silicon powder is waste in industrial production and widely available. The silicon carbon particulate reinforced composite material has the beneficial effects of high strength, fine grain size, low manufacturing cost and the like.

Description

technical field : [0001] The invention belongs to the technical field of comprehensive utilization of secondary resources, and in particular relates to a method for preparing a silicon carbide particle-reinforced silicon-containing aluminum alloy composite material from crystalline silicon cutting waste. Background technique [0002] In the current period of energy shortage and people's increasing awareness of environmental protection, the global solar industry is still developing at a rate of 30%. As one of the main materials in the solar industry, crystalline silicon is entering the era of high-speed industrialization. The crystalline silicon wafers used are affected by factors such as yield and cost. The mainstream process still uses water-based cutting fluid composed of polyethylene glycol and silicon carbide micropowder for slicing production. This process is due to the steel wire driving the cutting fluid to the silicon rod. Grinding debris is carried out, so that nea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/10C22C21/00C22C32/00
Inventor 郭菁
Owner XINJIANG JOINWORLD CO LTD
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