Method for calibrating internal temperature field of amorphous alloy prepared by spark plasma sintering

A method for calibrating an internal temperature field of an amorphous alloy prepared by spark plasma sintering (SPS), comprising the following steps:

• (1) sintering an amorphous alloy powder by the SPS to obtain a bulk amorphous alloy sample;
• (2) cutting a part of the bulk amorphous alloy sample obtained in step (1) into a number of amorphous alloy sub-blocks, and marking a position of each of the amorphous alloy sub-blocks in the bulk amorphous alloy sample, wherein the part of the bulk amorphous alloy sample is where a temperature field needs to be calibrated;
• (3) performing a first isothermal crystallization treatment on each of the amorphous alloy sub-blocks obtained in step (2) respectively at a same holding temperature to obtain a crystallization time of each of the amorphous alloy sub-blocks, wherein the holding temperature is in a supercooled liquid region of the amorphous alloy sub-blocks;
• (4) performing an annealing treatment and a second isothermal crystallization treatment on an amorphous alloy powder material, which is the same as the amorphous alloy powder used in preparation of the bulk amorphous alloy sample, at different annealing temperatures, so as to obtain a corresponding crystallization time of the amorphous alloy powder material at the different annealing temperatures, and a functional relationship between the annealing temperature and the crystallization time of the amorphous alloy powder material, wherein in step (4), a holding temperature in performing the second isothermal crystallization treatment on the amorphous alloy powder material is the same as the holding temperature in performing the first isothermal crystallization treatment on the amorphous alloy sub-blocks in step (3);
• (5) substituting the crystallization times of the amorphous alloy sub-blocks obtained in step (3) into the functional relationship between the annealing temperature and the crystallization time in step (4), thereby obtaining a temperature distribution of the different amorphous alloy sub-blocks corresponding to different positions inside the bulk amorphous alloy sample during the SPS.