Titanium-aluminum-silicon alloy coating material and preparation method thereof

The invention relates to a titanium-aluminum-silicon alloy coating material and a preparation method thereof. The titanium-aluminum-silicon alloy coating material comprises, on the basis of atomic percent, 5 to 91% of titanium, 5 to 45% of aluminum and 1 to 60% of silicon. The invention further comprises the hot-pressing sintering preparation method for the titanium-aluminum-silicon alloy coating material. The method comprises the following steps: filling a sintering die with Ti3Al alloy powder, AlSi powder, titanium powder, aluminum powder and silicon powder, putting the sintering die into a vacuum hot pressing furnace and carrying out heating to a temperature of 600 to 700 DEG C when a vacuum degree is less than 1 Pa, wherein a heating rate is maintained to be 2 to 10 DEG C/min and the pressure of the pressure head of the hot pressing furnace is maintained to be 5 to 10 MPa; and continuing heating to 800 to 1400 DEG C, allowing the pressure of the pressure head of the hot pressing furnace to rise to 15 to 20 MPa, maintaining the temperature and the pressure for 30 to 120 min, then carrying out cooling and pressure relief and finally carrying out natural cooling to room temperature. The titanium-aluminum-silicon alloy coating material provided by the invention has the advantages of uniform alloy components, high compactness, short process flow, low production cost and stable quality.