A special high titanium hydride powder for preparing aluminum foam and its preparation method

Abstract

The invention provides a special high titanium hydride powder for preparing foamed aluminum and a preparation method of the special high titanium hydride powder. For the titanium powder, the angle of repose is not greater than 45 degrees, and the granularity is 0.3-3 microns. The titanium powder comprises the following components in percentage by weight: 89-91.5% of Ti, greater than or equal to 5% of H, 1.5-2.5% of Al2O3, 0.04-0.06% of Mg, 0.5-1% of N, and the balance being inevitable impurities. The invention further aims at providing a preparation method of the special high titanium hydride powder for preparing foamed aluminum. The preparation method comprises the following process steps in sequence: preparing raw materials, performing primary hydrogenation, seeping magnesium and aluminum, nitriding and performing secondary hydrogenation. The foamed aluminum prepared from the titanium powder provided by the invention is high in clearance rate, uniform in pore distribution, relatively large and consistent in aperture and high in pass percent and good rate, solves the technical difficulty that conventional foamed aluminum is hard to achieve industrialization in China, and has the great significance in breaking the blockade on techniques of other countries.

Description

technical field

[0001] The invention relates to the field of foaming agents involved in the preparation of foamed aluminum, in particular to a special high-hydrogen titanium powder for preparing foamed aluminum and a preparation method thereof. Background technique

[0002] Aluminum foam has both metal and air bubble characteristics. It has low density, high impact absorption ability, high temperature resistance, strong fire resistance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding, strong weather resistance, filtering ability, easy processing, easy installation, and high forming accuracy , Can carry out surface coating. The excellent physical properties, chemical properties, mechanical properties and recyclability of aluminum foam make aluminum foam have broad application prospects in today's material field, and it is regarded as one of the most promising engineering materials in the 21st century, espec...

Examples

Embodiment 1

[0017] Example 1: Preparation of special high-hydrogen titanium powder for aluminum foam, wherein the angle of repose is not greater than 45 degrees, the particle size is 0.3 μm to 2 μm, and the mass composition is: Ti: 89-91.5%; H: 5-7%; Al 2 o 3 : 1.5-2.5%; Mg: 0.04-0.06%; N: 0.5-1%; the rest are unavoidable impurities.

Embodiment 2

[0018] Example 2: Preparation of special high-hydrogen titanium powder for aluminum foam, the angle of repose is not greater than 30 degrees, the particle size is 0.3 μm to 2 μm, and the mass composition is: Ti: 89-91.5%; H: 5-6%; Al 2 o 3 : 1.5--2.5%; Mg: 0.04-0.06%; N: 0.5-1%; the rest are unavoidable impurities.

[0019] Among them, the higher the hydrogen content in the titanium powder, the higher the total amount of outgassing. Increasing the hydrogen content in the titanium powder will help to increase the gap rate of the foamed aluminum. In the case of hydrogen escape such as marginal outgassing, the 0.6g When titanium powder with a hydrogen content of 4% is added to 100g of liquid aluminum, the theoretical volume expansion rate of the prepared aluminum foam is as high as 27 times, and when 0.6g of titanium powder with a hydrogen content of 5% is added to 100g of liquid aluminum, the prepared aluminum foam has a volume expansion rate of 27 times. The theoretical volume...

technical field

[0001] The invention relates to the field of foaming agents involved in the preparation of foamed aluminum, in particular to a special high-hydrogen titanium powder for preparing foamed aluminum and a preparation method thereof. Background technique

[0002] Aluminum foam has both metal and air bubble characteristics. It has low density, high impact absorption ability, high temperature resistance, strong fire resistance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding, strong weather resistance, filtering ability, easy processing, easy installation, and high forming accuracy , Can carry out surface coating. The excellent physical properties, chemical properties, mechanical properties and recyclability of aluminum foam make aluminum foam have broad application prospects in today's material field, and it is regarded as one of the most promising engineering materials in the 21st century, espec...

Examples

Embodiment 1

[0017] Example 1: Preparation of special high-hydrogen titanium powder for aluminum foam, wherein the angle of repose is not greater than 45 degrees, the particle size is 0.3 μm to 2 μm, and the mass composition is: Ti: 89-91.5%; H: 5-7%; Al 2 o 3 : 1.5-2.5%; Mg: 0.04-0.06%; N: 0.5-1%; the rest are unavoidable impurities.

Embodiment 2

[0018] Example 2: Preparation of special high-hydrogen titanium powder for aluminum foam, the angle of repose is not greater than 30 degrees, the particle size is 0.3 μm to 2 μm, and the mass composition is: Ti: 89-91.5%; H: 5-6%; Al 2 o 3 : 1.5--2.5%; Mg: 0.04-0.06%; N: 0.5-1%; the rest are unavoidable impurities.

[0019] Among them, the higher the hydrogen content in the titanium powder, the higher the total amount of outgassing. Increasing the hydrogen content in the titanium powder will help to increase the gap rate of the foamed aluminum. In the case of hydrogen escape such as marginal outgassing, the 0.6g When titanium powder with a hydrogen content of 4% is added to 100g of liquid aluminum, the theoretical volume expansion rate of the prepared aluminum foam is as high as 27 times, and when 0.6g of titanium powder with a hydrogen content of 5% is added to 100g of liquid aluminum, the prepared aluminum foam has a volume expansion rate of 27 times. The theoretical volume...