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Powder body of solid solution among interlayer of titanium, silicon, aluminum, carbon, and preparation method

A solid solution, titanium-silicon-aluminum technology, applied in the field of titanium-silicon-aluminum-carbon interlayer solid solution powder and its preparation, to achieve the effect of simple method and easy industrial production

Inactive Publication Date: 2007-10-10
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using a small amount of aluminum as a reaction aid or additive effectively improves the purity of the titanium-silicon carbide synthesis product, but basically does not change the properties of the synthesized titanium-silicon carbide

Method used

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  • Powder body of solid solution among interlayer of titanium, silicon, aluminum, carbon, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 14.455 grams of Ti powder, 2.827 grams of Si powder, 0.543 grams of Al powder, and 2.175 grams of graphite powder. After mixing, add 15 ml of absolute ethanol and 40 grams of agate balls, mix the mixture for 2 hours, and then dry it in an oven at 70 ° C. , crushed, passed through a 100-mesh sieve, pressed into a block-shaped green body, put into a graphite crucible, and then moved into a high-temperature furnace. Under the protection of argon, the temperature was raised to 1470°C at a rate of 20°C / min, kept for 5 minutes, and then cooled. The loose massive product that reaction generates is taken out, pulverizes, ball mills, promptly obtains that the main phase of the present invention is Ti 3 Si 1.0 al 0.2 C 1.8 Titanium silicon aluminum carbon solid solution powder.

Embodiment 2

[0025] Weigh 14.471 grams of Ti powder, 2.264 grams of Si powder, 1.087 grams of Al powder, and 2.178 grams of graphite powder. After mixing, add 15 ml of absolute ethanol and 40 grams of agate balls, mix the mixture for 2 hours, and then dry it in an oven at 70 ° C. , crushed, passed through a 100-mesh sieve, pressed into a plate-shaped green body, put into a graphite crucible, and then moved into a high-temperature furnace. Under the protection of argon, the temperature was raised to 1450°C at a rate of 20°C / min, kept for 5 minutes, and then cooled. The loose massive product that reaction generates is taken out, pulverizes, ball mills, promptly obtains that the main phase of the present invention is Ti 3 Si 0.8 al 0.4 C 1.8 Titanium silicon aluminum carbon solid solution powder.

Embodiment 3

[0027] Weigh 14.487 grams of Ti powder, 1.70 grams of Si powder, 1.63 grams of Al powder, and 2.18 grams of graphite powder. After mixing, add 15 ml of absolute ethanol and 40 grams of agate balls, mix the mixture for 3 hours, and then dry it in an oven at 70 ° C. , crushed, passed through a 70-mesh sieve, pressed into a block green body, put into a graphite crucible, and then moved into a high-temperature furnace. Under the protection of argon, the temperature was raised to 1450°C at a rate of 30°C / min, kept for 5 minutes, and then cooled. The loose massive product that reaction generates is taken out, pulverizes, ball mills, promptly obtains that the main phase of the present invention is Ti 3 Si 0.6 al 0.6 C 1.8 Titanium silicon aluminum carbon solid solution powder.

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Abstract

This invention discloses a method for preparing Ti-Si-Al-C lamellar solid solution powder. The powder is composed of: Ti3Siy-xAlxCz (wherein, 0 less than x less than y; y is 1-1.2; z is 1.8-2) higher than 96 vol.%, and impurities lower than 4 vol.%. Ti3Siy-xAlxCz has the same lamellar crystal structure as Ti3SiC2 and Ti3AlC2. Si and Al atoms are set between two Ti3Cz lamellae. The crystal constants c and a increase with the increase of x. The method comprises: mixing Ti, Si, Al and graphite powder at a mol. ratio of 3.0:(0.1-1.1):(0.1-1.1):(1.8-2.0), ball-milling, pressing into a block, placing in a high-temperature furnace, calcining at 1400-1500 deg.C under Ar protection, keeping the temperature for 5-10 min, cooling to obtain loose block product, pulverizing, and ball-milling. The powder can be used to prepare composite or mono-phase Ti-Si-Al-C block material.

Description

technical field [0001] The invention relates to a titanium-silicon-aluminum-carbon interlayer solid solution powder and a preparation method thereof, belonging to the field of new ceramic materials. Background technique [0002] Solid solution materials generally have better comprehensive properties or certain special properties than their solvent materials or solute materials. Most of the practical metal materials are alloy materials based on solid solutions or completely composed of solid solutions; some ceramic materials with excellent properties, Such as Sialon, partially stabilized ZrO 2 , is also composed of a solid solution. [0003] Titanium silicon carbide and "312" phase titanium aluminum carbide were developed by W.Jeitschko & H.Nowotny (Monatsh Chem, 1967[98]: 329-337) and Pietzka & Schuster (J.Phase Equilib, 1994[15 ]: 392) discovered new ternary carbides, which have the same layered crystal structure and similar lattice parameters, and have high electrical co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/65
Inventor 翟洪祥李翠伟黄振莺
Owner BEIJING JIAOTONG UNIV
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