Moreover, re elements can fine the structure of the layer, improve precipitating carbonous chromiumnitride formed and increase the hardness of the layer.
而且稀土元素显著地细化渗层组织，促进氮碳化合物弥散细小析出，提高渗层硬度。
2
The application and preparation of ultra-fine chromiumnitride powders are presented. Specially, the progress in preparation technique is reviewed. with evaluation and directions for further study.