Abstract:Based on the mechanism of grain growth during desorption−recombination process of NdFeB alloy, Monte Carlo (MC) physical model was introduced to simulate microstructure evolution during grain growth process of Nd₂Fe₁₄B phase at various processing temperatures. Furthermore, the grain growth kinetics was studied. The analysis shows that the grain growth can be well simulated, and the average growth exponent n≈0.8 for the entire time domain by fitting the experimental data with the theoretical model, higher than the normal value of 0.5.

Key words: Monte Carlo simulation; grain growth; NdFeB alloy; desorption-recombination processing