Method for preparing Ti2AlN/TiAl compound material by regulating and controlling components accurately

A composite material and precise technology, applied in the field of composite material preparation, can solve problems such as easy introduction of impurities and difficulty in achieving large-scale control of TiAlN volume fraction

Inactive Publication Date: 2010-06-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is in order to solve the existing preparation Ti 2 The method of AlN / TiAl composite material is easy to introduce impurities, and it is difficult to achieve large-scale control of Ti 2 AlN volume fraction issues, provided a Ti 2 A Preparation Method for Precise Control of Components of AlN / TiAl Composite Materials

Method used

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  • Method for preparing Ti2AlN/TiAl compound material by regulating and controlling components accurately
  • Method for preparing Ti2AlN/TiAl compound material by regulating and controlling components accurately
  • Method for preparing Ti2AlN/TiAl compound material by regulating and controlling components accurately

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specific Embodiment approach 1

[0011] Specific embodiment one: a kind of Ti in this embodiment 2 The preparation method of precise control of AlN / TiAl composite material components is as follows: 1. Put Ti powder, Al powder, TiN powder and alloy element powder into the liquid dispersant, and then add Ti powder, Al powder, TiN powder and alloy element powder The ratio of the total weight to the weight of the balls is 1:5, and the rotation speed is 300 revolutions per minute, and the ball milling is performed for 3 hours to 24 hours, and then dried at a temperature of 50°C to 100°C to obtain a mixed powder; 2. Put the mixed powder into a graphite mold, raise the temperature from room temperature to 700°C at a rate of 10°C / min, and then keep the temperature and pressure at 700°C and a pressure of 20MPa to 60MPa for 1 to 4 hours; 3. After step 2, the graphite mold with mixed powder is raised from 700°C to 900°C at a rate of 10°C / min, and then kept at 900°C and pressure of 20MPa to 60MPa for 1 to 4 hours. ; 4. ...

specific Embodiment approach 2

[0013] Embodiment 2: This embodiment differs from Embodiment 1 in that the liquid dispersant described in step 1 is alcohol, acetone or distilled water, and the others are the same as Embodiment 1.

specific Embodiment approach 3

[0014] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the alloying element mentioned in Step 1 is one of Nb, Cr, Mn, Si and B or a combination of several of them. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a Ti2AlN / TiAl compound material by regulating and controlling components accurately, and relates to the method for preparing a compound material. The method for preparing the Ti2AlN / TiAl compound material by regulating and controlling the components accurately solves the problems that the prior method for preparing the Ti2AlN / TiAl compound material is easy to introduce impurities and is difficult to control the volume fraction of the Ti2AlN / TiAl on large scale. The method comprises the following steps: firstly, putting Ti powder, Al powder and TiN powder into a liquid dispersant according to certain percentage, ball-milling the mixture, and drying the mixture to obtain mixed powder; and secondly, putting the mixed powder into a graphite mold, preserving heat and pressure of the mixed powder at 700 DEG C, 900 DEG C and 1,300 DEG C respectively, and cooling the mixed powder to a room temperature in a furnace so as to obtain the Ti2AlN / TiAl compound material. The method for preparing the Ti2AlN / TiAl compound material of the invention cannot introduce the impurities, and can control the volume fraction of the Ti2AlN / TiAl on a large scale by regulating the addition of the TiN powder.

Description

technical field [0001] The invention relates to a preparation method of a composite material. Background technique [0002] Currently reported Ti 2 There are two main methods for preparing AlN / TiAl composites: [0003] Spray deposition method: Ti and Al are used as spray substances, and the spray atmosphere is a mixed gas (nitrogen + hydrogen). Ti and Al droplets are nitrided on the surface during flight, and then the flying droplets fall on the preheated substrate. On the substrate, the target composite material is formed after further reaction on the substrate. The disadvantage of this method is that the amount of N element adsorbed on the surface of Ti and Al droplets is limited, so it is difficult to control the amount of Ti on a large scale. 2 The volume fraction of AlN; the obtained material also contains a small amount of other types of nitrides and Ti-Al compounds, resulting in material impurity; the Ti in the obtained material 2 The distribution of AlN is wavy, ...

Claims

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Application Information

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IPC IPC(8): B22F3/16
Inventor 孙东立孙涛韩秀丽修子扬武高辉白亚冠郭强
Owner HARBIN INST OF TECH
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