Instant liquid-phase pervasion jointing ternary layered ceramic titanium carbon silicification technique

A diffusion bonding and ternary layered technology, which is applied in the new technology field of instantaneous liquid phase diffusion bonding of ternary layered ceramic titanium silicide, can solve the problems of limiting and reducing the high temperature oxidation resistance of ceramics, and achieves low cost and sample size. Low surface treatment requirements and the effect of expanding the scope of application

Inactive Publication Date: 2009-02-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the bending strength of the joints they connect is only 100MPa, which is only Ti 3 SiC 2 One-fourth the bending strength of ceramic
Moreover, due to the high temperature activity of Ti, the reduction of Ti 3 SiC 2 The high temperature oxidation resistance of ceramics also limits the Ti 3 SiC 2 Application of ceramics

Method used

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  • Instant liquid-phase pervasion jointing ternary layered ceramic titanium carbon silicification technique
  • Instant liquid-phase pervasion jointing ternary layered ceramic titanium carbon silicification technique
  • Instant liquid-phase pervasion jointing ternary layered ceramic titanium carbon silicification technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Ti 3 SiC 2 Ceramic grinding and polishing; aluminum foil with 1000 # Grinding with SiC sandpaper to remove the surface oxide film, the aluminum foil is 50 μm thick after grinding; after the sample is ultrasonically cleaned, the aluminum foil is used as the middle layer, and the upper and lower layers are Ti 3 SiC 2 Ceramics are loaded into a high-temperature hot-press furnace for connection under argon protection. First, keep the temperature at 600°C for 30min at a constant pressure of 20MPa to ensure that Ti 3 SiC 2 Ceramic and Al are in close contact. Then heated at a heating rate of 10°C / min, and simultaneously pressurized to 5 MPa at a loading rate of 0.2kN / min. At 1500°C, keep it warm for 120min, then cool down to 1300°C with the furnace and unload. The microscopic morphology of the interface after connection was observed with a scanning electron microscope, and it was found that the elemental Al completely disappeared, the interface was well connected, and ...

Embodiment 2

[0019] Ti 3 SiC 2 Ceramic grinding and polishing; aluminum foil with 1000 # Grinding with SiC sandpaper to remove the surface oxide film, the aluminum foil is 70 μm thick after grinding; after the sample is ultrasonically cleaned, the aluminum foil is used as the middle layer, and the upper and lower layers are Ti 3 SiC 2 Ceramics are loaded into a high-temperature hot-press furnace for connection under argon protection. First, keep the temperature at 600°C for 30min at a constant pressure of 20MPa to ensure that Ti 3 SiC 2 Ceramic and Al are in close contact. Then heat at a rate of 15°C / min, and simultaneously pressurize to 5 MPa at a rate of 0.5kN / min. After heating to 1400°C, keep it warm for 150 minutes, and then cool down to 1200°C with the furnace to unload. The microscopic morphology of the interface after connection was observed with a scanning electron microscope, and the existence of elemental Al was not observed, and the interface was well connected, and ther...

Embodiment 3

[0021] Ti 3 SiC 2 Ceramic grinding and polishing; aluminum foil with 1000 # Grinding with SiC sandpaper to remove the surface oxide film, the aluminum foil is 100 μm thick after grinding; after the sample is ultrasonically cleaned, the aluminum foil is used as the middle layer, and the upper and lower layers are Ti 3 SiC 2 Ceramics are loaded into a high-temperature hot-press furnace for connection under argon protection. First, keep the temperature at 650°C for 10 minutes at a constant pressure of 10 MPa to ensure that Ti 3 SiC 2 Ceramic and Al are in close contact. Then, it was heated at a rate of temperature increase of 15° C. / min, and simultaneously pressurized to 2 MPa at a rate of 0.2 kN / min. After heating to 1500°C, keep it warm for 180 minutes, and then cool down to 1300°C with the furnace to unload. The microscopic morphology of the interface after connection was observed with a scanning electron microscope, and the existence of elemental Al was not observed, a...

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Abstract

The invention discloses a new instant liquid-phased dispersing connecting technique of ternary layered ceramic Ti3SiC2, which comprises the following steps: adding aluminum foil with thickness between 50 um and 100um among the welded ternary layered ceramic Ti3SiC2; placing the test sample in the hot-pressed furnace; aerating argon gas to protect; insulating under 600-650 deg. c at 10-20Mpa for 10-30 min; heating at 10-15deg. c / min; setting the welding temperature at 1400-1500 deg. c under 2-5Mpa for 90-180 min. The invention avoids the influence of relative joint strength due to brittle to improve the joint bending strength by 65%, which expands the using scale of Ti3SiC2 ceramic under 1000 deg. c.

Description

technical field [0001] The invention relates to ceramic connection technology, in particular to a ternary layered ceramic titanium silicide carbon (Ti 3 SiC 2 ) A new process of instantaneous liquid phase diffusion connection. Background technique [0002] Ti 3 SiC 2 It is a new type of ternary layered ceramic material. Research in the Journal of the American Ceramic Society (Journal of the American Ceramic Society 79, 1953 (1996)) shows that it combines many advantages of ceramics and metals, with low density, high modulus, high strength, high electrical conductivity and thermal conductivity. And the characteristics of easy processing, so Ti 3 SiC 2 Ceramics are a new type of structural / functional integrated material that is promising to be used in high-tech fields such as aviation, aerospace, nuclear industry, and electronic information, and is especially suitable as a high-temperature structural material. Although to Ti 3 SiC 2 The synthesis and properties of cer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/02
Inventor 尹孝辉李美栓周延春
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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