US 12,332,155 B2
Preparation method for iron-based alloy powder EBSD test sample
Zuming Liu, Changsha (CN); Quan Li, Changsha (CN); Boyun Huang, Changsha (CN); Xueqian Lv, Changsha (CN); Kai Peng, Changsha (CN); and Fan Zhao, Changsha (CN)
Assigned to CENTRAL SOUTH UNIVERSITY, Changsha (CN)
Appl. No. 17/260,560
Filed by CENTRAL SOUTH UNIVERSITY, Changsha (CN)
PCT Filed Aug. 30, 2018, PCT No. PCT/CN2018/103114
§ 371(c)(1), (2) Date Jan. 15, 2021,
PCT Pub. No. WO2020/019400, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 201810846725.0 (CN), filed on Jul. 27, 2018.
Prior Publication US 2021/0270706 A1, Sep. 2, 2021
Int. Cl. G01N 1/36 (2006.01); C23C 18/16 (2006.01); C23C 18/18 (2006.01); C23C 18/36 (2006.01); C23F 17/00 (2006.01); C25F 3/06 (2006.01); C25F 3/24 (2006.01); G01N 1/28 (2006.01); G01N 23/203 (2006.01); C25F 1/06 (2006.01)
CPC G01N 1/36 (2013.01) [C23C 18/1637 (2013.01); C23C 18/1646 (2013.01); C23C 18/1676 (2013.01); C23C 18/168 (2013.01); C23C 18/1844 (2013.01); C23C 18/36 (2013.01); C23F 17/00 (2013.01); C25F 3/06 (2013.01); C25F 3/24 (2013.01); G01N 1/286 (2013.01); G01N 23/203 (2013.01); C25F 1/06 (2013.01); G01N 2001/2866 (2013.01); G01N 2223/053 (2013.01)] 10 Claims
OG exemplary drawing
 
1. 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.