Method for preparing laminated-structured Ti-(TiB+La2O3)/Ti composite material

A technology of layered structure and composite materials, which is applied in the field of preparation of layered titanium-based composite materials, can solve the problems of poor toughness and weak interlayer bonding of layered titanium-based composite materials, so as to improve performance, reduce oxygen content, fine The effect of crystallization

Active Publication Date: 2015-06-24
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0005] In order to solve the technical problems of poor toughness of existing discontinuous particle-reinforced titanium-based composite materials and weak

Method used

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  • Method for preparing laminated-structured Ti-(TiB+La2O3)/Ti composite material
  • Method for preparing laminated-structured Ti-(TiB+La2O3)/Ti composite material

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Embodiment 1

[0026] Step 1. Weigh raw materials Ti powder and LaB 6 Powder: The particle size of Ti powder used is about 100μm, LaB 6 The particle size of the powder is about 50 μm. According to the in situ reaction formula 12Ti+2LaB at high temperature 6 +3[O]=12TiB+La 2 o 3Calculate the Ti powder and LaB when the final reinforcement volume fraction is 5%, 10%, and 15% respectively 6 The proportion of powder, Ti powder mass fraction 93.4% ~ 97.8%, LaB 6 The powder mass fraction is 2.2% to 6.6%, calculated according to the size of the special mold used and weighed Ti powder and LaB under the three reinforcement volume fractions 6 The masses of powder are 46.78g, 1.05g; 45.78g, 2.09g; 44.78g, 3.14g;

[0027] Step 2. Preparation of Ti powder and LaB 6 Mixed powder of powder: the Ti powder and LaB powder weighed in step 1 6 The powder is placed in a ball mill tank, the ball-to-material ratio is 5:1, and the rotating speed is 150r / min with a rotary mixer for 15 minutes to obtain a unif...

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Abstract

The invention provides a method for preparing a laminated-structured Ti-(TiB+La2O3)/Ti composite material. The method comprises the following steps of calculating the mass of Ti powder and LaB6 powder needed for preparing reinforcement material according to the volume fraction of the reinforcement material, and weighing the Ti powder and the LaB6 powder; ball-milling the Ti powder and the LaB6 powder, and mixing uniformly to obtain mixed powder; taking Ti powder additionally, laying the Ti powder and the mixed powder in a mould alternately in layers, and performing cold pressing and forming to obtain a laminated-structured prefabricate; performing high-temperature densification sintering on the laminated-structured prefabricate in vacuum, furnace-cooling and taking the prefabricate out to obtain the laminated-structured Ti-(TiB+La2O3)/Ti composite material. The relative density of the laminated-structured Ti-(TiB+La2O3)/Ti composite material is further improved by adopting multi-channel high-temperature hot rolling, grains are refined, the distribution of the reinforcement material is improved, and layer thickness is obviously reduced.

Description

technical field [0001] The invention relates to a method for preparing a layered titanium-based composite material, in particular to a method for preparing a layered structure Ti-(TiB+La by powder metallurgy) 2 o 3 ) / Ti composite method. Background technique [0002] Titanium and titanium alloys have low density, high specific strength, high temperature resistance and corrosion resistance, and are widely used in aerospace, shipbuilding, medical treatment, sports equipment, chemical energy and other fields. When the development of titanium alloy materials is close to the limit of a certain performance, it is difficult to improve the performance by simply changing the solid solution elements. At this time, you can choose to add reinforcements to the alloy to obtain higher performance. Since the 1970s, many studies on titanium-based composites have been carried out at home and abroad. According to the type of reinforcement, it is mainly divided into continuous fiber-reinforce...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C14/00C22C32/00B22F7/02
Inventor 吕维洁韩远飞段宏强王立强张荻
Owner SHANGHAI JIAO TONG UNIV
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