Salt bath niobium infiltrating agent and niobium infiltrating method of lanthanum oxide (la2o3) catalyzed infiltration on the surface of titanium metal

A technology of metal titanium and lanthanum oxide, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of high industrialization difficulty, complex process, poor flexibility, etc., and achieve low cost, simple operation, and improved The effect of niobium penetration rate

Active Publication Date: 2018-12-21
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to invent a kind of lanthanum oxide (La 2 o 3 ) salt bath niobium infiltrating agent for infiltration and corresponding niobium infiltration method, which can not only increase the infiltration rate but also obtain a niobium infiltration layer with excellent surface quality, and has good operability and excellent economy

Method used

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  • Salt bath niobium infiltrating agent and niobium infiltrating method of lanthanum oxide (la2o3) catalyzed infiltration on the surface of titanium metal
  • Salt bath niobium infiltrating agent and niobium infiltrating method of lanthanum oxide (la2o3) catalyzed infiltration on the surface of titanium metal
  • Salt bath niobium infiltrating agent and niobium infiltrating method of lanthanum oxide (la2o3) catalyzed infiltration on the surface of titanium metal

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A metal titanium surface lanthanum oxide (La 2 o 3 ) Niobium infiltration method of salt bath infiltration niobium agent, which includes niobium infiltration preparation, workpiece pretreatment, niobium infiltration agent pretreatment, niobium infiltration and workpiece cleaning, wherein:

[0028] (1) Preparation of niobium infiltrating agent

[0029] Get 840 grams of anhydrous borax (Na 2 B 4 o 7 ), 100 grams of niobium oxide (Nb 2 o 5 ), 40 grams of silicon carbide (SiC) and 20 grams of lanthanum oxide (La 2 o 3 ) was mixed and dried at 125 °C for 50 minutes to obtain lanthanum oxide (La 2 o 3 ) Salt bath niobium infiltration agent for osmosis, set aside. The silicon carbide can be commercially available green and pure powder with a particle size of 150-200 mesh, the purity of niobium oxide is 99.5% or above, and the purity of lanthanum oxide is 99.99% or above.

[0030] (2) Workpiece pretreatment:

[0031] Cut the TC4 titanium alloy bar into 10 mm×12 mm×3...

Embodiment 2

[0038] The method is basically the same as in Example 1, except that the niobium infiltrating agent adopted does not add La 2 o 3 Catalyst, wherein the mass percentage of SiC is 6%.

[0039] Test after taking out the sample. The thickness of the permeated layer is 1.6 μm ( figure 2 ), the microhardness of the outer layer of niobium infiltrated layer is 943.4 HV.

Embodiment 3

[0041] A metal titanium surface lanthanum oxide (La 2 o 3 ) Niobium infiltration method of salt bath infiltration niobium agent, which includes niobium infiltration preparation, workpiece pretreatment, niobium infiltration agent pretreatment, niobium infiltration and workpiece cleaning, wherein:

[0042] (1) Preparation of niobium infiltrating agent

[0043] Get 880 grams of anhydrous borax (Na 2 B 4 o 7 ), 80 grams of niobium oxide (Nb 2 o 5 ), 20 grams of silicon carbide (SiC) and 20 grams of lanthanum oxide (La 2 o 3 ) mixed and dried at 130 °C for 60 minutes to obtain lanthanum oxide (La 2 o 3 ) Salt bath niobium infiltration agent for osmosis, set aside. The silicon carbide can be commercially available green and pure powder with a particle size of 150-200 mesh, the purity of niobium oxide is 99.5% or above, and the purity of lanthanum oxide is 99.99% or above.

[0044] (2) Workpiece pretreatment:

[0045] Cut the TC4 titanium alloy bar into 10 mm×12 mm×3 mm p...

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Abstract

The invention provides a salt bath niobiumizing agent with metallic titanium surface lanthanum oxide (La2O3) for accelerating niobiumizing and a niobiumizing method of the salt bath niobiumizing agent. The salt bath niobiumizing agent is characterized in that 2-4% of lanthanum oxide (La2O3) as a niobiumizing accelerating agent is added in the niobiumizing agent, meanwhile, the preparation method and the niobiumizing method of the niobiumizing agent are determined, and key method parameters of niobiumizing are as follows: niobiumizing temperature is 900-1,050 DEG C, and niobiumizing insulating time is 5-10 hours. The niobiumizing speed is high, a niobiumizing layer is thick, surface quality of workpieces is good, an operation method is simple, economic performance is excellent, and the salt bath niobiumizing agent can be used for industrial production, and has quite wide application prospect in the fields of biomedical application and the like.

Description

technical field [0001] The invention relates to a chemical heat treatment technology, especially a niobium infiltrating agent and a method for infiltrating niobium, specifically a lanthanum oxide (La 2 o 3 ) Salt bath niobium infiltration agent and niobium infiltration method for infiltration. Background technique [0002] As biomedical materials, titanium and titanium alloys are widely used in hard tissue replacement, heart valves, vascular stents, tooth Roots and various orthopedic devices, etc. However, although its elastic modulus is lower than that of other biomedical materials, it is still much higher than that of human bone, and its hardness is low, its coefficient of friction is large, its surface wear resistance is poor, and its corrosion resistance needs to be further improved. Because Ti-Nb alloy has the advantages of ultra-low elastic modulus, corrosion resistance and good biocompatibility, and the infiltration of niobium has been confirmed to enhance the hard...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/24C23C10/02
CPCC23C10/02C23C10/24
Inventor 许晓静吴刘军韩天宋振华何星华
Owner JIANGSU UNIV
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