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NiCrAl modified oxide ceramic reinforced iron-based composite material as well as preparation method and application thereof

A technology of iron-based composite materials and oxide ceramics, which is applied in metal material coating technology, transportation and packaging, metal processing equipment, etc., can solve cracks, affect the service life and service safety of composite materials, alumina and iron matrix Problems such as non-wetting

Active Publication Date: 2020-10-23
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbide ceramics, boride ceramics and oxide ceramics are currently the most widely used reinforcing particles, in which WC and the matrix form Fe at the interface 3 W 3 C, metallurgical bonding is formed at the interface, but tungsten carbide ceramics are expensive, high manufacturing cost, and cracks are easily generated at the interface due to thermal stress; borides are low in cost, but brittle, which increases the difficulty of toughening; alumina ceramics have It has high hardness and matches the physical properties of the steel matrix, but the aluminum oxide and the iron matrix are almost non-wetting, and the brittleness is relatively large; YSZ ceramics are due to the ZrO 2 Self-toughening effect of ceramics and Y 2 o 3 Excellent stability can be used as an ideal reinforcing phase to replace alumina ceramics, but the interface between YSZ ceramics and metal matrix iron is still dominated by mechanical bonding, which seriously affects the service life and service safety of composite materials

Method used

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  • NiCrAl modified oxide ceramic reinforced iron-based composite material as well as preparation method and application thereof
  • NiCrAl modified oxide ceramic reinforced iron-based composite material as well as preparation method and application thereof
  • NiCrAl modified oxide ceramic reinforced iron-based composite material as well as preparation method and application thereof

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preparation example Construction

[0033] A kind of preparation method of NiCrAl modified oxide ceramics reinforced iron-based composite material of the present invention comprises the following steps:

[0034] S1, YSZ P The ceramic particles are soaked in alcohol for 10-20 minutes, then cleaned with ultrasonic waves for 5-25 minutes, and then dried in a vacuum drying oven;

[0035] S2. YSZ with irregular shape P Put it into a three-dimensional ball mill for ball milling treatment at a speed of 50-150r / min, and the duration is 1-10h, so that YSZ P The ceramic particles obtain a micro-roughened surface, which increases the binding sites of the NiCrAl alloy in the subsequent plating process, thereby improving the plating efficiency. Use a 5-60 mesh screen to filter YSZ P ceramic particles;

[0036] S3. Using the method of magnetron sputtering in YSZ P NiCrAl alloy is deposited on the surface of ceramic particles to make the surface metallized, and the vacuum degree of the cavity is 1.0×10 -3 ~1.0×10 -2 Pa, ...

Embodiment 1

[0045] YSZ first P Soak in alcohol for 10 minutes, then ultrasonic cleaning for 25 minutes, and then dry, the irregular shape of YSZ P Put it into a three-dimensional ball mill and mill it at a speed of 150r / min for 1 hour, and grind for 30 minutes and stop for 15 minutes each time; P The surface is plated with nickel-chromium-aluminum alloy, Ar (purity 99.99%) is the protective gas during plating, and the vacuum degree of the cavity is 1.0×10 -3 Pa, temperature 100°C, bias voltage 90V, current 1A, and plating time 30min to metallize the surface, and place YSZ in continuous rotation during the deposition process P The turntable, followed by ultrasonic cleaning for 15min, drying; then the YSZ plated with NiCrAl alloy P Stir and mix with micron-sized NiCrAl powder accounting for 10% of the mass of the ceramic and a binder accounting for 2% of the total mass of the mixed powder, and then put it into a mold for curing; put the preform into a vacuum tube furnace, heat it to 1100 ...

Embodiment 2

[0049] YSZ first P Soak in alcohol for 15 minutes, then ultrasonically clean for 10 minutes, then dry, and then place in a vacuum oven for 1 hour to dry the irregularly shaped YSZ P Put it into a three-dimensional ball mill and mill it at a speed of 120r / min for 3 hours, and stop for 15 minutes every 30 minutes; then use magnetron sputtering method in YSZ P The surface is plated with nickel-chromium-aluminum alloy, Ar (purity 99.99%) is the protective gas during plating, and the vacuum degree of the cavity is 3.0×10 -3 Pa, temperature 200°C, bias voltage 100V, current 3A, and plating time 2h to metallize the surface, and place YSZ in continuous rotation during the deposition process P The turntable, followed by ultrasonic cleaning for 15min, drying; then the YSZ plated with NiCrAl alloy P Stir and mix with micron-sized NiCrAl powder accounting for 20% of the mass of the ceramic and a binder accounting for 4% of the total mass of the mixed powder, and then put it into a mold ...

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Abstract

The invention discloses a NiCrAl modified oxide ceramic reinforced iron-based composite material as well as a preparation method and application thereof. The preparation method comprises the followingsteps that YSZp ceramic particles are cleaned and dried; the YSZp ceramic particles are put into a three-dimensional ball mill to be subjected to ball milling treatment; the surfaces of the YSZp ceramic particles are plated with NiCrAl alloys by adopting a magnetron sputtering method, and surface metallization is carried out; the plated YSZP ceramic particles and micron-sized NiCrAl powder are mixed in a binding agent; then the mixture is shaped in a mold to obtain a prefabricated body with a honeycomb structure; then the honeycomb-shaped prefabricated body is subjected to sintering treatment; and the prefabricated body is placed in a sand box and fixed, molten metal is poured, and the composite material with the good interface bonding performance is obtained. According to the NiCrAl modified oxide ceramic reinforced iron-based composite material as well as the preparation method and the application thereof, the surfaces of the YSZp ceramic particles are plated with NiCr metal coatings, then the YSZp ceramic particles and the NiCrAl metal powder are subjected to sintering treatment, and finally the matrix molten metal is poured so that the metal-based composite material with excellent wear resistance can be obtained, and the interface bonding mode of the metal-based composite material is metallurgical bonding.

Description

technical field [0001] The invention belongs to the technical field of preparation of wear-resistant materials, and in particular relates to a NiCrAl modified oxide ceramic reinforced iron-based composite material and a preparation method and application thereof. Background technique [0002] Oxide ceramics reinforced steel-based wear-resistant materials are widely used in important wear-resistant parts in the fields of mining, metallurgy, cement, and electric power. Due to the poor stability and wear resistance of domestic large-scale wear-resistant parts, the service life is short, and it is difficult to meet the needs of reels in large elevators. , Cranes, hydropower stations, ship accessories and port machinery, etc. have strict requirements on the safety and stability of application conditions. Therefore, at present, domestic large-scale key wear-resistant components are still mainly imported from abroad. [0003] Ceramic-reinforced iron-based composites introduce a rei...

Claims

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Application Information

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IPC IPC(8): C22C33/02B22D23/04B22F1/02B22F3/11C23C14/18C23C14/35
CPCC22C33/0242B22D23/04B22F3/1115C23C14/185C23C14/35B22F1/17
Inventor 李烨飞李聪李博高义民郑巧玲李月辉赵四勇
Owner XI AN JIAOTONG UNIV