Preparation method for iron-based alloy powder EBSD test sample

A preparation method for an iron-based alloy powder EBSD test sample, comprising the following steps:

• step 1, iron-based powder surface electrolytic activation:
• soaking an iron-based alloy powder into an electrolytic solution for surface activation by an electrolytic activation to obtain an activated powder;
• and then cleaning the activated powder by an absolute ethanol and/or an absolute methanol via ultrasonic cleaning;
• finally, drying the activated powder to obtain a surface activated powder;
• step 2, adding the surface activated powder to a chemical embedding solution, then dispersing the surface activated powder in the chemical embedding solution by ultrasonic mixing to obtain a mixture;
• performing a process;
• and then heating the mixture to 80-92° C. for a chemical reaction to obtain an iron-based alloy bulk coated with nickel;
• wherein the process is as follows:
• a process of still standing, stirring, and repeating the still standing is taken as a cycle, and at least one cycle is performed to complete the process;
• wherein the chemical embedding solution comprises the following components:
• 28-32 g/L of nickel chloride;
• 15-30 g/L of sodium hypophosphite;
• 14-16 g/L of sodium acetate;
• 14-16 g/L of sodium citrate;
• 4-6 g/L of succinic acid;
• 5-15 g/L of glycine;
• 1-3 vol./% of glycerol;
• and
• 1-3 vol./% of glacial acetic acid;
• a pH value of the chemical embedding solution is 3.5-5.4;
• and
• step 3, grinding and electropolishing the iron-based alloy bulk coated with nickel obtained in step 2 to obtain the iron-based alloy powder EBSD test sample.