Abstract: The effect of B on surface structures and properties of synthetic diamond has been investigated.The results show that on surfaces of diamond synthesized by boronized graphite or boronized catalyst alloy patterns as helix,step,branch and river et al.are seen.The properties of the diamond are not nearly impaired by the patterns.The properties of diamond with B are obviously better than that of diamond without B.And the effects of boronized graphite on the properties of diamond are higher than that of boronized catalyst alloy.

Key words: The effect of B on surface structures and properties of synthetic diamond has been investigated.The results show that on surfaces of diamond synthesized by boronized graphite or boronized catalyst alloy patterns as helix,step,branch and river et al.are seen.The properties of the diamond are not nearly impaired by the patterns.The properties of diamond with B are obviously better than that of diamond without B.And the effects of boronized graphite on the properties of diamond are higher than that of boronized catalyst alloy.