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a y 2 o 3 Alloyed ti‑8si‑1.4zr alloy and method for preparing same

A ti-8si-1.4zr, alloying technology, applied in the field of materials, can solve the problem of low overall performance of titanium-silicon alloy, and achieve the effects of excellent economy, simple operation and easy realization.

Active Publication Date: 2017-09-12
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 solve the problem that the overall performance of the existing titanium-silicon alloy is not high, and to invent a method for preparing titanium-silicon-zirconium alloy using "high-energy ball milling-molding molding-vacuum pressureless sintering", and by adding nanometer Y 2 o 3 Powder, to obtain titanium alloy materials with better comprehensive performance and high content of titanium silicon compounds

Method used

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  • a y <sub>2</sub> o <sub>3</sub> Alloyed ti‑8si‑1.4zr alloy and method for preparing same
  • a y <sub>2</sub> o <sub>3</sub> Alloyed ti‑8si‑1.4zr alloy and method for preparing same
  • a y <sub>2</sub> o <sub>3</sub> Alloyed ti‑8si‑1.4zr alloy and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 , 2 , 4, and 5.

[0033] a Y 2 o 3 Alloyed Ti-8Si-1.4Zr alloy: Ti-8Si-1.4Zr-0.1Y 2 o 3 prepared by the following method:

[0034] First, prepare 30g of Ti, Si, Zr and nano Y 2 o 3 Mixed powder of powder, wherein Ti powder 90.5wt.% (27.15g), Si powder 8wt.% (2.4g), Zr powder 1.4wt.% (0.42g), nanometer Y 2 o 3 Powder 0.1wt.% (0.03g) put the mixed powder in a beaker and stir evenly;

[0035] Secondly, first weigh 240g of agate balls and place them in a 500ml nylon ball mill jar according to the ball-to-material ratio of 8:1, then place the weighed and evenly mixed mixed powder in a nylon ball mill jar, and seal it with a cover;

[0036] Then, install the ball mill jar on the planetary ball mill, start the ball mill, the ball mill parameter is set to 300r / min, the ball mill stops for 15 minutes after 1h, and after 48 hours of ball milling, take out the powder in the ball mill jar;

[0037] Further, pass the mixed powder taken out through a 300-me...

Embodiment 2

[0043] Such as figure 1 , 3 , 4, 6 shown.

[0044] a Y 2 o 3 Alloyed Ti-8Si-1.4Zr alloy: Ti-8Si-1.4Zr-0.3Y 2 o 3 The preparation method:

[0045] This embodiment is similar to Embodiment 1, the difference is that Y 2 o 3 The mass fraction of powder is increased from 0.1wt.% (0.03g) to 0.3wt.% (0.09g), correspondingly, the mass fraction of Ti powder is reduced to 90.3wt.% (27.09g) from 90.5wt.% (27.15g) ).

[0046] Ti-8Si-1.4Zr-0.3Y prepared by the above steps 2 o 3 The mechanical alloying phenomenon of the mixed powder is obvious, image 3 Ti-8Si-1.4Zr-0.3Y obtained after high-energy ball milling in this example 2 o 3 The XRD diffraction pattern of the powder, after analysis, contains Ti 5 Si 4 , TiSi and TiSi 2 and Ti 2 Zr and Zr 3 Si 2 and other compounds, Ti 5 Si 4 The diffraction peak intensity of TiSi 2 The intensity of the diffraction peak is slightly higher, indicating that Y 2 o 3 Can promote the transformation between compounds; Figure 6 Ti-8...

Embodiment 3

[0052] a Y 2 o 3 Alloyed Ti-8Si-1.4Zr alloy: Ti-8Si-1.4Zr-1Y 2 o 3 prepared by the following method:

[0053] First, prepare 30g of Ti, Si, Zr and nano Y 2 o 3 Mixed powder of powder, wherein Ti powder 89.6wt.% (26.88g), Si powder 8wt.% (2.4g), Zr powder 1.4wt.% (0.42g), nanometer Y 2 o 3 Powder 1wt.% (0.3g) put the mixed powder in a beaker and stir evenly;

[0054] Secondly, first weigh 300g of agate balls and place them in a 500ml nylon ball mill jar according to the ball-to-material ratio of 10:1, then place the weighed and evenly mixed mixed powder in the nylon ball mill jar, and seal it with a cover;

[0055] Then, install the ball mill jar on the planetary ball mill, start the ball mill, the ball mill parameter is set to 350r / min, the ball mill stops for 15min after 1h, and after the ball mill for 50h, take out the powder in the ball mill jar;

[0056] Further, the mixed powder taken out is placed in a vacuum drying oven and heated to 60-80°C for at least 4 hours...

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Abstract

The invention discloses Y2O3 alloying Ti-8Si-1.4Zr alloy and a preparation method thereof. The Y2O3 alloying Ti-8Si-1.4Zr alloy is characterized by comprising the preparation raw materials of Ti powder, Si powder, Zr powder and nano Y2O3 powder. The preparation method includes the steps that first, the Ti powder, the Si powder, the Zr powder and the nano Y2O3 powder are subjected to high-energy ball milling after being mixed evenly so as to achieve partial alloying; then, the ball-milled powder is sieved and dried; afterwards, the dried powder is subjected to compression molding to form a pressing block; and at last, sufficient alloying is realized through vacuum pressureless sintering. The Ti-8Si-1.4Zr-xY2O3 alloy surface achieves component homogeneity, fracture toughness, oxidation resistance and the like are improved to a certain degree, and the alloy has a wide application prospect in the fields of aerospace, transportation and weapons.

Description

technical field [0001] The invention relates to a material technology, especially a Zr alloying optimization technology of Ti-8Si alloy material, specifically a Y alloy that improves compactness, oxidation resistance and friction and wear performance 2 o 3 Alloyed Ti-8Si-1.4Zr alloy and method for its preparation. Background technique [0002] Because titanium alloys have beneficial properties such as high specific strength, high specific stiffness, and corrosion resistance, in the next few decades, my country's large aircraft engineering, ships and future marine development, high-performance engines, new fighters, manned spaceflight projects, There is an increasing demand for titanium alloys in fields such as lunar exploration projects, aviation, supersonic cruise missiles, sea exploration projects, a new generation of armed helicopters, national economic industries, and medical devices that improve people's quality of life. Aerospace is one of the fields with the largest ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C32/00C22C1/05C22C1/10
CPCC22C1/05C22C14/00C22C32/0031
Inventor 许晓静吴刘军刘庆辉仲奕颖陈婷卓韩天戈晓岚
Owner JIANGSU UNIV