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Method for preparing TiC-TiB2 nano-micrometre multiple phase ceramic coating

A technology of multiphase ceramics and tic-tib2, which is applied in the field of preparation of multiphase ceramic coatings, can solve the problems of slow cooling rate, easy growth of reinforced phase TiC grains, and insignificant improvement effect, so as to improve strength and efficiency. , the effect of reducing the cost of synthesis

Inactive Publication Date: 2007-09-19
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, some people use the method of compounding TiC to improve single TiB 2 The various deficiencies faced by ceramic coatings, but during the synthesis process, due to the slow cooling rate, the reinforcement phase TiC grains are easy to grow, so it is limited to the micron-scale composite level, and the real nanoscale TiC reinforcement phase cannot be obtained, and its improvement effect not obvious

Method used

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  • Method for preparing TiC-TiB2 nano-micrometre multiple phase ceramic coating
  • Method for preparing TiC-TiB2 nano-micrometre multiple phase ceramic coating
  • Method for preparing TiC-TiB2 nano-micrometre multiple phase ceramic coating

Examples

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Effect test

Embodiment 1

[0035] A TiC-TiB 2 Nano-micro composite ceramic coating, the composition (weight%) of the required components for preparing the coating is 35.8% TiO 2 , 26.3% B 2 O 3 , 26.9% C, 8% nano TiC, 3% CeO 2 .

[0036] The above TiC-TiB 2 The preparation process of nano-micro composite ceramic coating includes the following steps:

[0037] (1) The reactant TiO 2 , Reactant B 2 O 3 , Reactant C, nano TiC and CeO 2 The powder precursor is assembled into cohesive particles with a particle size of about 30μm through plasma densification and granulation;

[0038] (2) First thermal spray Ni-based alloy as a primer layer on the 45# steel substrate with a thickness of about 0.2mm, and then spray a layer of adhesive particles with a thickness of about 0.8mm;

[0039] (3) Adding CO 2 Liquid light-absorbing paint with laser absorptivity; the liquid light-absorbing paint consists of a nano-oxide main material selected from zinc oxide, titanium oxide, silicon dioxide, aluminum oxide or rare earth oxid...

Embodiment 2

[0045] A TiC-TiB 2 Nano-micro composite ceramic coating, the composition (weight %) of the required components for preparing the coating is 60.6% TiO 2 , 12.8% B 4 C, 13.6% C, 10% nano TiC, 3% Y 2 O 3 .

[0046] The above TiC-TiB 2 The preparation process of nano-micro composite ceramic coating includes the following steps:

[0047] (1) The reactant TiO 2 , Reactant B 4 C, reactant C and nanometer TiC and Y 2 O 3 The powder precursor is assembled into cohesive particles with a particle size of about 30μm through plasma densification and granulation;

[0048] (2) First thermal spray Ni-based alloy as a primer layer on the 45# steel substrate with a thickness of about 0.2mm, and then spray a layer of adhesive particles with a thickness of about 1.0mm;

[0049] (3) Coating the surface of the pre-assembled coating to increase the 2 Special liquid light-absorbing paint with laser absorptivity (the liquid light-absorbing paint is the same as in Example 1);

[0050] (4) Perform laser sca...

Embodiment 3

[0053] A TiC-TiB 2 Nano-micro composite ceramic coating, the composition (weight %) of the required components for preparing the coating is 65.3% Ti, 14.7% B, 15% nano TiC, 5% In 2 O 3 .

[0054] The above TiC-TiB 2 The preparation process of nano-micro composite ceramic coating includes the following steps:

[0055] (1) The reactant Ti, reactant B, nano TiC and In 2 O 3 The powder precursor is assembled into cohesive particles with a particle size of about 30μm through plasma densification and granulation;

[0056] (2) First thermal spraying Ni-based alloy as a primer layer on the 45# steel substrate with a thickness of about 0.2mm, and then spraying a layer of adhesive particles with a thickness of about 0.8mm;

[0057] (3) Coating the surface of the pre-assembled coating to increase the 2 Special liquid light-absorbing paint with laser absorptivity (the liquid light-absorbing paint is the same as in Example 1);

[0058] (4) Perform laser scanning on the above pre-assembled coat...

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Abstract

The invention discloses a method for preparing TiC-TiB2 nanometer-micro complex phase ceramics coating, including the steps of: bonding granule, the gramularity of which is 30 Mum, is produced by ion densification granulating after mixing uniformly the reactive A selected from Ti or TiO2, the reactive B selected from boron, B2O3 or B4C, the reactive C, nanometer TiC and rare-earth oxide powder precursor; hot spraying Ni alloy base coat of 0.1-0.3mm on 45 steel base, then cold spraying a bonding granule of 0.5-1mm; coating liquid absorbing paint comprising nanomete oxide and other addition agent for improving absorptivity for CO2 laser on the surface of pre-assembly coating; TiC-TiB2 nanometer-micro complex phase ceramics coating is produced by laser-scanning the said pre-assembly coating. The invention can solve the defects that today' TiB2 coating has low cost, low efficiency, low toughness and poor binding force with based body.

Description

Technical field [0001] The invention relates to a preparation method of a multiphase ceramic coating, in particular to a TiC-TiB 2 Preparation method of nano-micro composite ceramic coating. Background technique [0002] TiB 2 It is a ceramic with special physical and chemical properties, due to its extremely high melting point (2980℃) and high hardness (3350Hv) 0.5N , Excellent wear resistance, high Young's modulus, good chemical stability, and is widely used as a protective layer for cutting tools, electrodes, turbine blades, combustion chambers, chemical reactors, crucibles, pump impellers and thermocouples . But currently TiB prepared by chemical vapor deposition (CVD), physical vapor deposition (PVD) and electrochemical deposition 2 Coating generally has disadvantages such as high cost, low efficiency, low coating toughness, and poor bonding force of the substrate, so there is still a long distance from practical application. [0003] Ceramic composite materials have made up...

Claims

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Application Information

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IPC IPC(8): C23C28/00C23C24/10C23C30/00C04B35/56
Inventor 李军李文戈张光钧
Owner SHANGHAI UNIV OF ENG SCI
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