CN104846312A - Cu-Co3O4-Al2O3 material and preparation method thereof - Google Patents

Abstract

The invention relates to a Cu-Co3O4-Al2O3 material and a preparation method thereof. The Cu-Co3O4-Al2O3 material is prepared from the following components in parts by mass: 5 parts of Cu, 19-28 parts of Co3O4, 66-80 parts of Al2O3, 1 part of TiO2 and 0.15-0.68 parts of microelements, wherein the microelements are C, Mo, B, Fe and Co. The preparation method comprises the following steps: preparing Cu-Co3O4-Al2O3 nanospheres by adopting a gas atomization method; mixing the prepared nanospheres with C, Mo, B, Fe and Co to prepare nanopowder by adopting an active agent protection method. The coating hardness reaches HRC38, the density can reach 7.43g/cm<3>, the spraying thickness can reach 5mm, and the compactness is good and is 0.62; the Cu-Co3O4-Al2O3 material is suitable for plasma spraying and has certain hardness and anti-wear performance, and the bonding strength and grasping force are high.

Description

A kind of Cu-Co 3o 4-Al 2o 3material and preparation method thereof

Technical field

The present invention relates to technical field of hot, is a kind of Cu-Co specifically ₃o ₄-Al ₂o ₃material and preparation method thereof.

Background technology

In thermal spray process, trickle and dispersion metal or nonmetallic coated material, with one fusing or semi-molten state, deposit to a kind of through preparation matrix surface, form certain spray deposited layer.Its thermal source utilized, as Powdered or thread metal or non-metallic material are heated to melting or semi-melting state by electric arc, plasma spraying or combustion flame etc., then be ejected into pretreated matrix surface by flame stream itself or pressurized air with certain speed, deposit and form a kind of technology with the top coat of various function.

Plasma spraying is the one in thermospray, plasma spraying plasma spraying is the technology of a kind of material surface strengthening and surface modification, and matrix surface can be made to have wear-resisting, anti-corrosion, high temperature oxidation resisting, electrical isolation, heat insulation, radioprotective, the performance such as anti-attrition and sealing.

In many decades in the past, plasma spraying technology develops rapidly, but the popularization and application that the material bond strength that 2 traditional spraying technologies use is poor, void content is high, the problem that wears no resistance hinders hot-spraying techniques.Be difficult to meet the service requirements that people improve day by day to type material.

Summary of the invention

Poor in order to solve conventional coatings wear resistance, the problems such as hardness is lower, the invention provides a kind of Cu-Co ₃o ₄-Al ₂o ₃material and preparation method thereof.

Technical problem to be solved by this invention realizes by the following technical solutions:

A kind of Cu-Co ₃o ₄-Al ₂o ₃material, the mass fraction of its component and each component is that Cu accounts for 5 parts, Co ₃o ₄account for 19-28 part, Al ₂o ₃account for 66-80 part, TiO ₂account for 1 part, trace element accounts for 0.15-0.68 part, described TiO ₂add as additive, the bonding strength of material can be improved.

Al ₂o ₃material hardness and bonding strength can be improved.

Described trace element is C, Mo, B, Fe, Co, and the pure metal of Mo is silvery white, very hard, and a small amount of Mo is added among coating, and coating can be made hardening.

Co is the glossiness Steel Grey metal of tool, harder and crisp, water effect of getting along well at normal temperatures, also very stable in malaria.It is the important source material of producing refractory alloy, Wimet, anti-corrosion alloy, magneticalloy and various cobalt salt that the physics of Co, chemical property determine it.

A kind of Cu-Co ₃o ₄-Al ₂o ₃the preparation method of material, comprises the following steps:

(1) aerosolization legal system is adopted to obtain Cu-Co ₃o ₄-Al ₂o ₃nanometer ball;

(2) nanometer ball obtained in step (1) employing promoting agent protection method mixed C, Mo, B, Fe, Co are obtained nanometer powder.

The invention has the beneficial effects as follows: coating hardness of the present invention reaches HRC38, density can reach 7.43g/cm ³, coating thickness can reach 5 millimeters, and density is well 0.62, is applicable to plasma spraying, has certain hardness and wear resistance, and bonding strength, grasping force are higher.The present invention has very large progress compared with conventional alloys material, and at identical conditions, the anchoring strength of coating that the present invention makes is about 2.4 times of common coating.

Embodiment

The technique means realized to make the present invention and creation characteristic are easy to understand, and set forth further below to the present invention.

Embodiment one:

A kind of Cu-Co ₃o ₄-Al ₂o ₃material, the mass fraction of its component and each component is that Cu accounts for 5 parts, Co ₃o ₄account for 19 parts, Al ₂o ₃account for 66 parts, TiO ₂account for 1 part, trace element accounts for 0.15 part.

Described trace element is C, Mo, B, Fe, Co.

A kind of Cu-Co ₃o ₄-Al ₂o ₃the preparation method of material, comprises the following steps:

(1) aerosolization legal system is adopted to obtain Cu-Co ₃o ₄-Al ₂o ₃nanometer ball;

(2) nanometer ball obtained in step (1) employing promoting agent protection method mixed C, Mo, B, Fe, Co are obtained nanometer powder.

Embodiment two:

A kind of Cu-Co ₃o ₄-Al ₂o ₃material, the mass fraction of its component and each component is that Cu accounts for 5 parts, Co ₃o ₄account for 23 parts, Al ₂o ₃account for 69 parts, TiO ₂account for 1 part, trace element accounts for 0.34 part.

Described trace element is C, Mo, B, Fe, Co.

A kind of Cu-Co ₃o ₄-Al ₂o ₃the preparation method of material, with embodiment one.

Embodiment three:

A kind of Cu-Co ₃o ₄-Al ₂o ₃material, the mass fraction of its component and each component is that Cu accounts for 5 parts, Co ₃o ₄account for 24 parts, Al ₂o ₃account for 74 parts, TiO ₂account for 1 part, trace element accounts for 0.52 part.

Described trace element is C, Mo, B, Fe, Co.

A kind of Cu-Co ₃o ₄-Al ₂o ₃the preparation method of material, with embodiment one.

Embodiment four:

A kind of Cu-Co ₃o ₄-Al ₂o ₃material, the mass fraction of its component and each component is that Cu accounts for 5 parts, Co ₃o ₄account for 28 parts, Al ₂o ₃account for 80 parts, TiO ₂account for 1 part, trace element accounts for 0.68 part.

Described trace element is C, Mo, B, Fe, Co.

A kind of Cu-Co ₃o ₄-Al ₂o ₃the preparation method of material, with embodiment one.

Adopt plasma spraying technology obtained Cu-Co on the rod class workpiece being matrix with 20Co steel ₃o ₄-Al ₂o ₃nano coating, the matrix with described coating and bonding strength, microhardness, void content and the abrasive wear resistance contrast and experiment without the matrix of described coating are in table 1:

Table 1 Cu-Co ₃o ₄-Al ₂o ₃the performance comparison experimental result of nano coating and 20Co steel matrix:

Experimental group is numbered	Porosity (AREA%)	Bonding strength (MPa)	Microhardness (HV)
				1	0.352	79.3	854
2	0.363	76.4	753
				3	0.362	71.4	786
4	0.452	82.2	745
				Mean value	0.382	77.3	784
Comparative group	0.793	40.4	413

Adopt plasma spraying technology obtained Cu-Co on the rod class workpiece being matrix with 20Co steel ₃o ₄-Al ₂o ₃coating, the abrasion loss contrast and experiment of the matrix with described coating and the matrix without described coating is in table 2:

Table 2 Cu-Co ₃o ₄-Al ₂o ₃the abrasion loss contrast and experiment of nano coating and 20Co steel matrix:

Experimental group is numbered	Before wearing and tearing (g)	After wearing and tearing (g)	Abrasion loss (g)
				1	62.4745	62.4668	0.0077
2	62.6542	62.6483	0.0059
				3	62.8548	62.8479	0.0069
4	62.7479	62.7410	0.0069

Comparative group

62.4527

62.4365

0.0162

From table 1 and table 2, Cu-Co ₃o ₄-Al ₂o ₃the excellent combination property of nano coating, wear resistance is good.

The present invention is applicable to plasma spraying, and available spraying steel have: 2Cr13,4Cr13,9Cr18,4Cr5W2VSi, 8Cr3 etc.

More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; the just principle of the present invention described in above-described embodiment and specification sheets; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (2)

1. a Cu-Co ₃o ₄-Al ₂o ₃material, is characterized in that: the mass fraction of its component and each component is that Cu accounts for 5 parts, Co ₃o ₄account for 19-28 part, Al ₂o ₃account for 66-80 part, TiO ₂account for 1 part, trace element accounts for 0.15-0.68 part;

Described trace element is C, Mo, B, Fe, Co.

2. a Cu-Co ₃o ₄-Al ₂o ₃the preparation method of material, is characterized in that: comprise the following steps:

(1) aerosolization legal system is adopted to obtain Cu-Co ₃o ₄-Al ₂o ₃nanometer ball;

(2) nanometer ball obtained in step (1) employing promoting agent protection method mixed C, Mo, B, Fe, Co are obtained nanometer powder.