Preparation method of nanosheet phase reinforced tini-based alloy composite plate

A nanosheet and composite sheet technology, which is applied in the field of preparation of reinforced TiNi-based alloy composite sheets, can solve the problems of uneven distribution and size of the reinforced phase, difficulty in smelting nanosheet-based reinforced TiNi-based composite materials, etc., and meet equipment requirements Low, easy to control, simple preparation process

Active Publication Date: 2017-05-24
HARBIN ENG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing nano-sheet phase reinforced TiNi-based alloy composite plates that can solve the problems of difficult smelting of nano-sheet phase-reinforced TiNi-based composite materials, and uneven distribution and size of the reinforcement phase.

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  • Preparation method of nanosheet phase reinforced tini-based alloy composite plate
  • Preparation method of nanosheet phase reinforced tini-based alloy composite plate
  • Preparation method of nanosheet phase reinforced tini-based alloy composite plate

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preparation example Construction

[0023] The preparation method of the nanosheet phase reinforced TiNi-based alloy composite plate of the present invention mainly comprises:

[0024] (1) According to the design requirements, the thickness of the TiNi-based shape memory alloy foil and the reinforced metal foil is selected, and the surface is pickled;

[0025] (2) alternately stack the pickled TiNi-based shape memory alloy and the reinforced metal foil and ensure that the outermost layer is a TiNi-based alloy foil, and use a sintering process to sinter it under a certain pressure and temperature;

[0026] (3) Vacuum-seal the sintered TiNi-based alloy composite material in a stainless steel or pure Ti sheath, and repeatedly roll it to the required thickness at room temperature-500°C;

[0027] (4) Annealing the above-mentioned composite sheet in the range of 200° C. to 600° C. can obtain a nanosheet phase reinforced TiNi-based composite sheet.

[0028] The reinforcing phase metal elements include Nb, W and Ag, et...

specific Embodiment approach 1

[0031] (1) Put the TiNi shape memory alloy foil in HF, HNO 3 and pickling in a mixed solution of deionized water;

[0032] (2) Grinding the Nb foil with metallographic sandpaper to remove surface oxide skin;

[0033] (3) Place the pickled TiN shape memory alloy in acetone and ultrasonically clean it for 15 minutes, and rinse it with alcohol;

[0034] (4) Alternately stack pickled TiNi-based shape memory alloys and Nb foils and ensure that the outermost layer is a TiNi-based alloy sheet, which is sintered by hot-pressing sintering process, with a vacuum of 2×10 -3 -1×10 -2 Pa, the sintering pressure is 30-90MPa, the sintering temperature is 900-1100℃, and the sintering time is 0.5-4h;

[0035] (5) Vacuum-seal the sintered composite profile in a stainless steel sheath, and roll it into a plate at room temperature to 500°C, with a rolling deformation of 30% to 70%;

[0036] (6) Annealing the rolled composite plate at 200° C. to 600° C. for 1-2 hours to obtain a TiNi-based com...

specific Embodiment approach 2

[0038] The difference between this embodiment and Embodiment 1 is that the sintering method used in step (4) in this embodiment is spark plasma sintering, the sintering pressure is 30-90MPa, the sintering temperature is 850-1000°C, and the sintering time is 0.5-90MPa. 1h.

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Abstract

The invention provides a preparation method of a nanosheet layer phase reinforced TiNi-based alloy composite plate. The preparation method comprises the following steps: (1) performing surface acid cleaning of TiNi-based shape memory alloy foil and reinforcing metal foil; (2) alternately stacking the TiNi-based shape memory alloy foil and the reinforcing metal foil that are subjected to acid cleaning while ensuring that the outermost layer is the TiNi-based alloy foil, and performing sintering formation by a sintering process; (3) sealing a TiNi-based alloy composite material formed by sintering into a stainless-steel or pure Ti sheath in a vacuum way, and performing rolling repeatedly within a temperature range from the room temperature to 500 DEG C; and (4) performing annealing treatment at 200-600 DEG C to obtain the nanosheet layer phase reinforced TiNi-based alloy composite plate. The preparation method has the advantages of simple process, easiness in regulation and control, low equipment requirement and the like. The nanosheet layer phase reinforced TiNi-based alloy composite plate prepared according to the preparation method is applicable to damping elements, drivers, medical instruments and the like.

Description

technical field [0001] The invention relates to a method for preparing a reinforced TiNi-based alloy composite plate, in particular to a method for preparing a nanosheet phase reinforced TiNi-based alloy composite plate. Background technique [0002] With its excellent shape memory effect, superelasticity, and good biocompatibility, TiNi-based shape memory alloys have been widely used in aerospace, mechatronics, and biomedical fields. In recent years, composite materials based on TiNi shape memory alloys have shown many novel characteristics, which have attracted extensive attention of researchers and are expected to broaden the application range of shape memory materials. For example, nanowire or nanosheet NbTi-reinforced TiNi(Nb) composites exhibit low elastic modulus, high elastic limit, and yield strength; nanosheet W-reinforced TiNi composites have high yield strength and tunable phase transition Hysteresis and high X-ray visibility; compounding Ag into the TiNi matrix...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/04
Inventor 佟运祥王广超李莉郑玉峰田兵
Owner HARBIN ENG UNIV
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