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Titanium/titanium carbide laminated composite material preparation method

A composite material and titanium carbide technology, applied in chemical instruments and methods, lamination, lamination devices, etc., can solve the problems of low fracture toughness, large single-layer thickness, and uneven single-layer thickness of TiC ceramics, and achieve interface The effect of good bonding, small macro stress and high uniformity

Inactive Publication Date: 2018-03-23
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the low fracture toughness of TiC ceramics, and the existing technology for preparing Ti / TiC laminated composite materials has complicated process, high impurity content, uneven single-layer thickness, large single-layer thickness, For the problem of high cost, a preparation method of Ti / TiC laminated composite material is provided

Method used

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  • Titanium/titanium carbide laminated composite material preparation method

Examples

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Embodiment 1

[0030] A Ti / TiC laminated composite material is formed by alternately stacking one layer of Ti and one layer of TiC, wherein the thickness of each Ti layer is about 40 μm, and the thickness of each TiC layer is about 40 μm.

[0031] A preparation method of Ti / TiC laminated composite material, comprising the following steps,

[0032] Step 1: Cut the Ti sheet with a thickness of 0.12mm and the C paper with a thickness of 0.02mm, the thickness ratio of the Ti sheet to the C paper is 6:1, and cut them into discs with a diameter of 30mm;

[0033] Step 2: Polish the Ti sheet with sandpaper and use HF / HNO 3 Mixed solution 250mL, the volume ratio of HF to water is 1:50, HNO 3 The volume ratio to water is 1:50, soak for 6 minutes, then ultrasonically clean the soaked Ti sheets and C paper with 500mL deionized water for 30 minutes, take them out and dry them;

[0034] Step 3: Take out the dried Ti sheets and C papers, including 70 Ti sheets and 70 C papers, alternately stack and place...

Embodiment 2

[0038] Step 1: Cut the Ti sheet with a thickness of 0.1mm and the C paper with a thickness of 0.02mm, the thickness ratio of the Ti sheet to the C paper is 5:1, and cut it into a disc with a diameter of 30mm;

[0039] Step 2: Polish the Ti sheet with sandpaper and use HF / HNO 3 Mixed solution 250mL, the volume ratio of HF to water is 1:50, HNO 3 The volume ratio to water is 1:50, soak for 6 minutes, then ultrasonically clean the soaked Ti sheets and C paper with 500mL deionized water for 30 minutes, take them out and dry them;

[0040] Step 3: Take out the dried Ti sheets and C papers, including 100 Ti sheets and 100 C papers, alternately stack and place them in the graphite mold according to the order of Ti sheets and C papers, and then put them into the vacuum hot-pressing furnace;

[0041] Step 4: Vacuumize the hearth of the vacuum hot pressing furnace, the vacuum degree is 4×10 -3 Pa, then fill the furnace with argon, keep the argon atmosphere in the furnace at 1MPa, rais...

Embodiment 3

[0044] Step 1: Cut the Ti sheet with a thickness of 0.2mm and the C paper with a thickness of 0.05mm, the thickness ratio of the Ti sheet to the C paper is 4:1, and cut it into a disc with a diameter of 30mm;

[0045] Step 2: Polish the Ti sheet with sandpaper and use HF / HNO 3 Mixed solution 250mL, the volume ratio of HF to water is 1:50, HNO 3 The volume ratio to water is 1:50, soak for 6 minutes, then ultrasonically clean the soaked Ti sheet and C paper with 500mL deionized water for 60 minutes, take them out and dry them;

[0046] Step 3: Take out the dried Ti sheets and C papers, including 140 Ti sheets and 140 C papers, alternately stack and place them in the graphite mold according to the order of Ti sheets and C papers, and then put them into the vacuum hot-press furnace;

[0047] Step 4: Vacuumize the hearth of the vacuum hot pressing furnace, the vacuum degree is 4×10 -3 Pa, then fill the furnace with argon, keep the argon atmosphere in the furnace at 1.3MPa, raise ...

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Abstract

The invention relates to a titanium / titanium carbide laminated composite material preparation method and belongs to the technical field of metal / ceramic laminated composite material preparation. According to the method, a layer of Ti and a layer of TiC are sequentially, circularly and alternately laminated; a vacuum hot press furnace is utilized to generate diffusion reaction between the Ti and Cunder high-purity argon protection and a certain temperature and pressure to form TiC ceramic phase in situ; then the TiC ceramic phase can form the TiC / Ti laminated-structure composite material withunreacted Ti. The composite material has higher bending strength which can exceed 700 MPa and better breaking tenacity which can exceed 22MPa.m<1 / 2>. Compared with TiC ceramic, toughness of the laminated composite material is remarkably improved; in addition, elasticity modulus of the TiC and the Ti are different; furthermore, Ti metal has plasticity and can effectively inhibit crack propagation in the material, so that reliability of the composite material is improved. In the laminated composite material preparation, a ceramic substrate is prevented from being prepared in advance, so that a preparation technology is simplified, cost is reduced, and practical value is obtained.

Description

technical field [0001] The invention relates to a method for preparing a titanium / titanium carbide (Ti / TiC) laminated composite material, belonging to the technical field of metal / ceramic laminated composite material preparation. Background technique [0002] TiC ceramics contain ionic bonds and are inherently brittle. Their flexural strength is about 550MPa, and their fracture toughness is relatively low (less than 5MPa m 1 / 2 ), which severely limits the application of TiC ceramic materials in the engineering field. How to increase the toughness and reliability of ceramic materials has always been a difficult problem in the current scientific community. Ti is a light and relatively stable transition metal, which has excellent properties such as corrosion resistance and high temperature resistance, and is widely used in aerospace, medical equipment, sporting goods and other fields. Ti has high activity and can be used to improve the wettability of the ceramic interface, the...

Claims

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Application Information

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IPC IPC(8): B32B37/06B32B37/10B32B38/16B32B15/00B32B9/00B32B9/04
CPCB32B9/005B32B9/041B32B15/00B32B37/06B32B37/10B32B37/1018B32B38/162B32B38/164B32B2307/558B32B2311/18B32B2315/02
Inventor 程兴旺谭友德马帅张洪梅吴世平
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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