Method for inflating micro-channels

A method for inflating a micro-channel, comprising steps of:

• Step (1) determining a quantitative relationship among titanium hydride content-temperature-hydrogen pressure and a relationship between a target pore size of the micro-channel and an amount of hydrogen released from decomposition of titanium hydride and a heating temperature;
• Step (2) grooring micro/nano grooves on a surface of an ultra-thin metal strip by a micro/nano scratcher, and performing surface cleaning treatment;
• Step (3) determining an amount of titanium hydride according to the quantitative relationship among titanium hydride content-temperature-hydrogen pressure and the relationship between the target pore size of the micro-channel and the amount of hydrogen released from decomposition of titanium hydride and the heating temperature determined in step (1), and the titanium hydride powder is placed in the micro/nano groove of the metal strip after the surface cleaning treatment in step (2);
• Step (4) covering another ultra-thin metal strip with identical size and identical surface cleaning treatment in step (2) on the ultra-thin metal strip in step (3), welding the edges of the two ultra-thin metal strips together by spot welding technology, and performing bond rolling;
• Step (5) heating the metal composite ultra-thin strip after bond rolling in step (4) under vacuum conditions, and keeping temperature to decompose the titanium hydride to release hydrogen, and by hydrogen pressure, plastic deformation occurs at the composite interface of the bond-rolled metal composite ultra-thin strip, and a tubular micro-channel structure is formed along the micro/nano groove groored in step (2);
• Step (6) cutting the tubular micro-channel structure generated in step (5) at an appropriate position to obtain a tubular micro-channel product;
• wherein a specific process of determining the quantitative relationship among titanium hydride content-temperature-hydrogen pressure and the relationship between the target pore size of the micro-channel and the amount of hydrogen released from decomposition of titanium hydride and the heating temperature in the step (1) comprising:
• calculating an equilibrium hydrogen pressure when titanium hydride decomposes by thermodynamic method;
• analyzing the decomposition behavior of titanium hydride in the actual heating process by differential scanning calorimeter and thermal weight loss analyzer, so as to obtain the heating temperature to decompose and release hydrogen to determine the quantitative relationship between titanium hydride content-temperature-hydrogen pressure;
• by the method of combining numerical simulation and bond rolling experiment, analyzing the effect of the hydrogen pressure and bond strength of the metal composite ultra-thin strip after bond rolling on the pore size of the micro-channel, and the corresponding relationship between the pore size of the micro-channel and the content of titanium hydride, the heating temperature, and the bond strength of the metal composite ultra-thin strip is obtained.