Method for synthesizing TiNi-TiN gradient material by laser-induction self-spreading under high temperature

A self-propagating high temperature, laser-induced technology, applied in the field of one-time synthesis of TiNi-TiN gradient materials, can solve the problems of complex process, high cost, inability to achieve, etc., and achieve the effect of simplifying the synthesis process, easy calculation, and high product purity

Inactive Publication Date: 2005-04-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of these methods are complex in process, and some are expensive, and the synthesis of TiNi-TiN can not be realized at one time.

Method used

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  • Method for synthesizing TiNi-TiN gradient material by laser-induction self-spreading under high temperature
  • Method for synthesizing TiNi-TiN gradient material by laser-induction self-spreading under high temperature
  • Method for synthesizing TiNi-TiN gradient material by laser-induction self-spreading under high temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The raw materials used in the present invention are Ti powder and Ni powder, and their main characteristics are shown in Table 1.

[0028] purity

atomic weight

Granularity

place of origin

Titanium powder

99.0％

47.88

200 mesh

Shanghai Runjie Chemical Reagent Co., Ltd.

nickel powder

99.5％

58.71

300 mesh

Shanghai Longxin Technology Development Co., Ltd.

[0029] (2) Prepare Ti and Ni metal powders with a molar ratio of 1:1, and calculate the mass percentages of Ti and Ni in the mixed powder:

[0030] Tiwt% 1:1 = 47.88 / (47.88+58.71) × 100% = 44.92% (1)

[0031] Niwt% 1:1 = 58.71 / (47.88+58.71) × 100% = 55.08% (2)

[0032] According to the calculation results, an appropriate amount of Ti and Ni powders were weighed with an electronic balance with an accuracy of 0.01 g, and then mixed with a powder mixer (fineness: 30-300 mesh, rotational speed: 24000 r / min). Turn on the machine for one minute each t...

Embodiment 2

[0038] The raw materials used in the present invention are Ti powder and Ni powder, and their main characteristics are shown in Table 1.

[0039] purity

atomic weight

Granularity

place of origin

Titanium powder

99.0％

47.88

250 mesh

Shanghai Runjie Chemical Reagent Co., Ltd.

nickel powder

99.5％

58.71

250 mesh

Shanghai Longxin Technology Development Co., Ltd.

[0040] (2) Prepare Ti and Ni metal powders with a molar ratio of 1:1, and calculate the mass percentages of Ti and Ni in the mixed powder:

[0041] Tiwt% 1:1 = 47.88 / (47.88+58.71) × 100% = 44.92% (1)

[0042] Niwt% 1:1 = 58.71 / (47.88+58.71) × 100% = 55.08% (2)

[0043] According to the calculation results, an appropriate amount of Ti and Ni powders were weighed with an electronic balance with an accuracy of 0.01 g, and then mixed with a powder mixer (fineness: 30-300 mesh, rotational speed: 24000 r / min). Turn on the machine for one minute each t...

Embodiment 3

[0049] The raw materials used in the present invention are Ti powder and Ni powder, and their main characteristics are shown in Table 1.

[0050] purity

atomic weight

Granularity

place of origin

Titanium powder

99.0％

47.88

300 mesh

Shanghai Runjie Chemical Reagent Co., Ltd.

nickel powder

99.5％

58.71

200 mesh

Shanghai Longxin Technology Development Co., Ltd.

[0051] (2) Prepare Ti and Ni metal powders with a molar ratio of 1:1, and calculate the mass percentages of Ti and Ni in the mixed powder:

[0052] Tiwt% 1:1 = 47.88 / (47.88+58.71) × 100% = 44.92% (1)

[0053] Niwt% 1:1 = 58.71 / (47.88+58.71) × 100% = 55.08% (2)

[0054]According to the calculation results, an appropriate amount of Ti and Ni powders were weighed with an electronic balance with an accuracy of 0.01 g, and then mixed with a powder mixer (fineness: 30-300 mesh, rotational speed: 24000 r / min). Turn on the machine for one minute each ti...

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Abstract

The laser induced self-spreading high temperature gradient TiNi-TiN material synthesizing process includes the following steps: weighing and mixing metal Ti and Ni powder in the same molar ratio; pressing the mixture into cylindrical sample via maintaining the pressure of 20-50 KN for 1-4 min; keeping the sample at 80-150 deg.c for 1-3 min to eliminate water and partial gas; setting the sample on sample stage inside reaction container, sealing the container, introducing nitrogen in the flow rate of 5-10 L/min for over 2 min, and igniting with CO2 laser and Nd:YAG laser to induce self-spreading high temperature reaction.

Description

technical field [0001] The invention relates to a method of laser-induced self-propagating high-temperature synthesis of TiNi-TiN gradient materials, specifically a method of using laser as an ignition heat source to induce Ti-Ni and Ti-N 2 Two systems undergo self-propagating reaction at the same time, a method for synthesizing TiNi-TiN gradient materials at one time. Background technique [0002] The traditional methods for preparing TiNi alloys mainly include melting and casting, powder metallurgy and reduction diffusion. The melting and casting method uses block raw materials. It is difficult to accurately control the composition during smelting, and segregation is easy to occur. It is often necessary to improve the performance of the ingot through multiple smelting and high-temperature homogenization treatments, so the cost is very high; the production of TiNi alloy by powder metallurgy requires Long-term high-temperature sintering is time-consuming and energy-consumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/12
Inventor 杨永强陈林
Owner SOUTH CHINA UNIV OF TECH
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