catalytic graphitization 

https://doi.org/10.1351/goldbook.C00894
The transformation of non-graphitic carbon into graphite by heat treatment in the presence of certain metals or minerals.
Note:
Catalytic graphitization gives a fixed degree of graphitization at lower temperature and/or for a shorter heat treatment time than in the absence of the catalytic additives (or a higher degree of graphitization at fixed heat treatment conditions). Often it involves dissolution of carbon and precipitation of graphite at the catalyst particles so that non-graphitizing carbons can be graphitized by this procedure.
Source:
PAC, 1995, 67, 473. (Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)) on page 484 [Terms] [Paper]