Oxidation of Ti−B−C−N film deposited on steel

Abstract

Ti-B-C-N films were deposited on tool steel substrates by a DC magnetron sputtering system, and their oxidation characteristics were investigated at the temperature range of 200°C to 800°C for up to 5 h in air. Ti-B-C-N films were oxidized to TiO2, which further reacted with FeO to become FeTiO3. The films did not display good oxidation resistance, owing to the evaporation of B, C and N into the air, film breakage, and poor film adherence owing to the mismatch of the thermal expansion coefficients between film and substrate.

Machinability and Material Removal Mechanism of Face Centred Cubic (FCC) Conductive Ceramic TiBCN in EDM Processing

“…In recently years, the addition of boron was found can improve exhibit excellent hardness, high melting point, good chemical and thermal stability [9], so the investigation of the ternary [10][11][12][13] and quaternary systems [14][15][16][17] which contain element B became hot study and development trend gradually, especially the study on the TiBCN film. But there are many problems exist and still cannot be solved of TiBCN film, such as film oxidation, breakage, evaporation, high cost, and so on [18]. It is like that TiBCN parts will be come into use earlier than film materials.…”

“…Any material can't own the characteristics all above at the same time, particularly larger elastic modulus and better electrical conductivity [20,21] made TiBCN suitable to be machined by EDM machining perfectly. It is necessary to explaining that the Fcc-TiB powder mentioned in reference [18][19][20] was defined as TiBCN finally based on our several years study in fact.…”