Preparation method for micro-grade spherical Mo-Ru brazing filler powder

A micron-scale, mo-ru technology, applied in the field of powder metallurgy, can solve the problems of unmarked Mo-Ru composite powder shape and size, etc., and achieve the effect of good powder fluidity

Active Publication Date: 2016-08-10
SINO PLATINUM METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Preparation method for micro-grade spherical Mo-Ru brazing filler powder
  • Preparation method for micro-grade spherical Mo-Ru brazing filler powder
  • Preparation method for micro-grade spherical Mo-Ru brazing filler powder

Examples

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Embodiment 1

[0018] The micron-sized spherical Mo-Ru composite powder of the present invention is obtained through the following steps:

[0019] (1) atomization granulation: with (NH 4 ) 2 RuCl 6 and (NH 4 ) 6 Mo 7 o 24 4H 2 O is the raw material, weigh the material (Mo: Ru mass ratio is 6:4), configure (NH 4 ) 2 RuCl 6 and (NH 4 ) 6 Mo 7 o 24 Solution, adopt spray drying method, control liquid flow rate is 4.0ml / min, atomization air pressure is 0.4MPa, inlet temperature is 170 ℃, and hot air flow rate is 5.0L / min, makes the spherical (NH 4 ) 2 RuCl 6 and (NH 4 ) 6 Mo 7 o 24 particles;

[0020] (2) Microwave calcination: the uniformly mixed spherical (NH 4 ) 2 RuCl 6 and (NH 4 ) 6 Mo 7 o 24 particles in an atmosphere of N 2 / H 2 (9:1vol) in a microwave calciner, the temperature is controlled at 400°C, kept for 3h, then raised to 900°C, and kept for 4h to prepare micron-sized spherical Mo-Ru composite powder with a particle size of 5-15μm.

Embodiment 2

[0022] The difference from Example 1 is that the atomization and granulation process is as follows: the flow rate of the control liquid is 5.0 mL / min, the atomization pressure is 0.5 MPa, the inlet temperature is 200° C., and the flow rate of hot air is 6.0 L / min. The calcination process is as follows: control the calcination temperature from room temperature to 450° C. for 2 hours, then raise the temperature to 950° C. for 4 hours, and cool with the furnace to obtain a composite powder with a particle size of 6-17 μm.

Embodiment 3

[0024] The difference from Example 1 is that the atomization and granulation process is as follows: the flow rate of the control liquid is 3.0 mL / min, the inlet temperature is 140° C., and the flow rate of hot air is 4.0 L / min. The calcination process is: control the calcination atmosphere N 2 / H 2 (Vol 9:1), heat up from room temperature to 500°C for 2 hours, then heat up to 1000°C for 4 hours, and cool in the furnace to obtain composite powder with a particle size of 4-16 μm.

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Abstract

The invention discloses a preparation method for micro-grade spherical Mo-Ru brazing filler powder, wherein prepared micro-grade Mo-Ru composite powder contains 35wt%-45wt% of ruthenium, has a particle size being 5-15 mum, and has an average particle size being about 10 mum. According to the preparation method, ammonium paramolybdate [NH4]6Mo7O24.4H2O] and diammonium hexachlororuthenate [(NH4)2RuCl6] are taken as raw materials, and the micro-grade spherical Mo-Ru composite powder is prepared by combining spray drying with a microwave calcination technology. The micro-grade spherical Mo-Ru brazing filler powder with ruthenium content being 35wt%-45wt%, particle size being 5-15 mum and average particle size being 10 mum is prepared by spray drying and the microwave calcinations process, and the liquidity of the powder is good. The molybdenum-ruthenium composite powder can be applied to special part welding flux of the high-temperature field.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a preparation method of micron-sized spherical Mo-Ru solder powder. Background technique [0002] Molybdenum and molybdenum alloys have high high-temperature strength and high-temperature hardness, good thermal conductivity and electrical conductivity, low thermal expansion coefficient, excellent wear resistance and corrosion resistance, and are widely used in aerospace, energy and power, microelectronics, biological Medicine, mechanical processing, medical equipment, lighting, glass fiber, national defense construction and other fields. Ruthenium has excellent characteristics such as high melting point, high hardness, superior chemical stability, high electrical conductivity and low ohmic contact resistance. Ruthenium and its alloys are widely used in aerospace, national defense technology, catalytic industry, microelectronics, mechanical processing and ot...

Claims

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Application Information

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IPC IPC(8): B22F9/30
CPCB22F9/30
Inventor 赵盘巢陈家林易伟闻明管伟明张俊敏王传军谭志龙沈月张秋波
Owner SINO PLATINUM METALS CO LTD
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