论文部分内容阅读
The microstructure of plasma nitrided layer catalyzed by rare-earth elements has been studied with TEM. The results show that the grains of γ-Fe4 N phase are refined by rare-earth elements and the plane defects in boundary are increased by rare-earth elements. The addition of rare-earth element increases the bombardment effect and the number of crystal defects such as vacancies, dislocation loops, twins and stacking faults in γ-Fe4 N phase and can produce the high-density dislocations in the ferrite of diffusion layer at a distance 0.08mm from the surface. The production of a number of crystal defects is one of important reasons why rare-earth element accelerates the diffusion of nitrogen atoms during plasma-n it riding.
The microstructure of plasma nitrided layer catalyzed by rare-earth elements has been studied with TEM. The results show that the grains of γ-Fe4 N phase are refined by rare-earth elements and the plane defects in boundary are increased by rare-earth elements . The addition of rare-earth element increases the bombardment effect and the number of crystal defects such as vacancies, dislocation loops, twins and stacking faults in γ-Fe4 N phase and can produce the high-density dislocations in the ferrite of diffusion layer at a production 0.08mm from the surface. The production of a number of crystal defects is one of important reasons why rare-earth element accelerates the diffusion of nitrogen atoms during plasma-n it riding.