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Ti3Al(1-x)SnxC2 solid solution material with adjustable friction coefficients and preparation method thereof

A technology of friction coefficient and solid solution, which is applied in the field of Ti3Al1-xSnxC2 solid solution material and its preparation, and achieves the effects of low cost, convenient operation and simple process

Active Publication Date: 2015-07-29
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far no Sn solid solution Ti 3 AlC 2 to control its tribological properties

Method used

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  • Ti3Al(1-x)SnxC2 solid solution material with adjustable friction coefficients and preparation method thereof
  • Ti3Al(1-x)SnxC2 solid solution material with adjustable friction coefficients and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] Weigh 23.93 grams of Ti powder, 14.81 grams of Al powder, 5.93 grams of Sn powder, and 55.33 grams of TiC powder. After mixing, add 200 grams of agate balls, ball mill the mixture for 3 hours, pass the mixed powder through a 200-mesh sieve, and put it into the surface coated with BN graphite mold, and apply a pressure of 8MPa, hold the pressure for 40s, put the pre-pressed mold into the hot-press sintering furnace, under the protection of argon, raise the furnace temperature to 1500°C, when the furnace temperature reaches the predetermined temperature, apply a pressure of 10MPa to the powder in the mold, keep the temperature and pressure for 120min, then lower the temperature at a rate of 10°C / min, and after cooling, Ti 3 Al 0.9 sn 0.1 C 2 solid solution material.

[0022] The obtained solid solution material is rubbed against low-carbon steel, and the measured friction coefficient is 0.1-0.13.

Embodiment approach 2

[0024] Weigh 22.86 grams of Ti powder, 12.89 grams of Al powder, 11.34 grams of Sn powder, and 52.91 grams of TiC powder. After mixing, add 200 grams of agate balls, ball mill the mixture for 2 hours, pass the mixed powder through a 100-mesh sieve, and put it into the surface coated with In the graphite mold of BN, apply a pressure of 6MPa, hold the pressure for 30s, put the pre-pressed mold into the hot-press sintering furnace, and raise the furnace temperature to 30°C / min under the protection of argon. 1450°C, when the furnace temperature reaches the predetermined temperature, apply a pressure of 20 MPa to the powder in the mold, keep the temperature and pressure for 60 minutes, and then lower the temperature at a rate of 30°C / min. After cooling, Ti 3 Al 0.8 sn 0.2 C 2 solid solution material.

[0025] The obtained solid solution material is rubbed against low-carbon steel, and the measured friction coefficient is 0.12-0.15.

Embodiment approach 3

[0027] Weigh 21.02 grams of Ti powder, 9.48 grams of Al powder, 20.85 grams of Sn powder, and 48.65 grams of TiC powder. After mixing, add 300 grams of agate balls, ball mill the mixture for 4 hours, pass the mixed powder through a 200-mesh sieve, and put it into the surface coated with BN graphite mold, and apply a pressure of 5 MPa, hold the pressure for 30s, put the pre-pressed mold into a hot-press sintering furnace, and raise the furnace temperature to 20°C / min under the protection of argon. 1400°C, when the furnace temperature reaches the predetermined temperature, apply a pressure of 25 MPa to the powder in the mold, keep the temperature and pressure for 30 minutes, and then lower the temperature at a rate of 20°C / min. After cooling, Ti 3 Al 0.6 sn 0.4 C 2 solid solution material.

[0028]The obtained solid solution material is rubbed against low-carbon steel, and the measured friction coefficient is 0.2-0.23.

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Abstract

The invention provides a Ti3Al(1-x)SnxC2 solid solution material with adjustable friction coefficients and a preparation method thereof. The Ti3Al(1-x)SnxC2 solid solution material comprises the following ingredients: Ti3Al(1-x)SnxC2 (0<x<1), TiC and other impurity phases, wherein the volume content of Ti3Al(1-x)SnxC2 is larger than 97%, and the total volume content of TiC and other impurity phases is less than 3%. Ti powder, Al powder, Sn powder and TiC powder are weighed according to the molar ratio of 1: (0.1-1.1): (1.8-2), subjected to ball milling and blending for 2-4 hours and placed in an argon-shielded hot-press furnace after being pre-molded at the pressure of 5-8 MPa, the furnace temperature is increased to 1200-1500 DEG C at the heating rate of 20-40 DEG C / min, the heat is preserved for 30-120 min at 10-30 MPa, and after cooling, the Ti3Al(1-x)SnxC2 solid solution material with the purity exceeding 97% is obtained. The friction coefficients of the material prepared by the method and low-carbon steel are adjustable within the range of 0.1-0.4 along with changes of the solid solution content of Sn. The Ti3Al(1-x)SnxC2 solid solution material can be widely applied to key devices in the fields of transportation and communication, machinery, aerospace, military industry and the like, such as pantograph slide plates and brake discs / brake linings of high-speed trains, blade bearings of gas turbine engines, and cylinder walls and piston rings of internal combustion engines.

Description

technical field [0001] The invention relates to a Ti with adjustable friction coefficient 3 Al 1-x sn x C 2 Solid solution materials and methods for their preparation. Background technique [0002] In recent years, the development of high-tech industry has a great demand for new materials with low wear rate, low friction coefficient or appropriate and stable friction coefficient used in a wider temperature range, such as blade bearings of gas turbines, sealing rings, cylinder walls of internal combustion engines and Piston rings, pantograph slides, brake discs and pads of high-speed trains, etc. [0003] Nanolayered MAX phase ceramics with more than 50 thermodynamically stable phases (M is a transition metal, A is a IIIA or IVA element, and X is C or N) have received more and more attention in recent years. In an inert high-temperature environment, the MAX phase decomposes into MX x Compounds and A-rich liquids have decomposition temperatures ranging from 1000°C to ove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C30/04C22C1/05
Inventor 黄振莺翟洪祥许浩蔡乐平王雅正周洋
Owner BEIJING JIAOTONG UNIV