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Preparation method for reinforcing Ti2AlNb composite material by using graphene

A composite material and graphene technology, which is applied in the field of preparation of graphene-reinforced Ti2AlNb composite materials, can solve the problems of poor thermal deformation ability, low temperature plasticity and toughness of AlNb alloys, etc., to reduce stress concentration effect and improve strength and toughness , the effect of optimizing performance

Inactive Publication Date: 2020-10-23
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0003] The technical problem solved by the present invention is to provide an optimized Ti 2 A new scheme and preparation method for the mechanical properties of AlNb alloys using graphene as a reinforcing phase to reinforce Ti 2 AlNb alloy, solve Ti 2 AlNb alloy has low plasticity and toughness at room temperature, and poor hot working deformation ability

Method used

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  • Preparation method for reinforcing Ti2AlNb composite material by using graphene
  • Preparation method for reinforcing Ti2AlNb composite material by using graphene

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Embodiment 1

[0016] Step 1. Add graphene or graphene oxide in proportion to absolute ethanol and carry out ultrasonic dispersion treatment for 30min to 10h to obtain a uniformly dispersed graphene or graphene oxide ethanol dispersion; wherein graphene or graphene oxide is mixed with no The ratio of water to ethanol is 0.1(g):50(ml), adding 0.5wt% of graphene or graphene oxide reinforcement phase, ultrasonic treatment time is 60min, and ultrasonic power is 800W.

[0017] Step 2. Ti powder, Al powder and Nb powder are packed in the ball mill tank according to the atomic ratio of 53:22:25;

[0018] Step 3. Evenly disperse and drop the dispersion prepared in step 1 into the ball mill tank prepared in step 2, then add steel balls into the ball mill tank according to a certain ball-to-material ratio of 10:1, and "pump the ball mill tank" Vacuum-filling with argon” was repeated 4 times, the vacuum degree was -0.09~-0.1MPa, the purity of argon gas was ≥99.5 vol.%, and ball milling was carried out ...

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Abstract

The invention belongs to the technical field of metal matrix composite materials and preparation thereof, and particularly relates to a preparation method for reinforcing a Ti2AlNb composite materialby using graphene. The preparation method adopts the graphene to reinforce a Ti2AlNb alloy, optimizes the properties of the Ti2AlNb alloy, and adopts the graphene to reinforce the Ti2AlNb composite material prepared by spark plasma sintering, it is found that the graphene is evenly distributed in the composite material, the relative density of the composite material reaches 98% or above, and whenthe content of the graphene is 0.5 wt.%, the fracture toughness and elongation of the composite material are improved by 70% and 51% correspondingly; the preparation method fully shows that the graphene has very remarkable toughening and plasticizing effects on the Ti2AlNb alloy, and when the the Ti2AlNb alloy is applied to the field of aviation starting, the combat performance of an aircraft canbe greatly improved.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite materials and preparation thereof, in particular to a graphene-reinforced Ti 2 Preparation method of AlNb composite material. Background technique [0002] Ti 2 AlNb alloy has good high-temperature performance, low density, and good oxidation resistance. It is considered to be the key high-temperature structural material used in aero-engines in the future to replace the current nickel-based superalloy. It has very important application prospects, such as replacing Inconel 718 alloy. (Domestic brand GH4169) As a component of an aero-engine, it can reduce weight by about 35%, thereby greatly improving the thrust-to-weight ratio of the engine and reducing energy consumption. However, Ti 2 AlNb alloys have low room temperature plasticity and toughness, and poor thermal deformation ability. Although they are slightly better than Ti-Al alloys, they are still hard-to-deform materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C14/00C22C32/00
CPCC22C1/05C22C14/00C22C32/0084
Inventor 熊博文刘康王振军熊威伍翔任佳俊蔡长春
Owner NANCHANG HANGKONG UNIVERSITY
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