Investigation of mechanical properties and oxidation resistance of CVD TiB2 ceramic coating on molybdenum | Zendy

Xiaoxiao Huang | Zendy; Shuchen Sun | Zendy; Ganfeng Tu | Zendy

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Investigation of mechanical properties and oxidation resistance of CVD TiB2 ceramic coating on molybdenum

Author(s) -

Xiaoxiao Huang,

Shuchen Sun,

Ganfeng Tu

Publication year - 2019

Publication title -

journal of materials research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.832

H-Index - 44

eISSN - 2214-0697

pISSN - 2238-7854

DOI - 10.1016/j.jmrt.2019.10.056

Subject(s) - materials science , ceramic , coating , molybdenum , isothermal process , substrate (aquarium) , chemical vapor deposition , adhesion , composite material , metallurgy , chemical engineering , nanotechnology , oceanography , physics , engineering , thermodynamics , geology

TiB2 anti-oxidation ceramic coatings were successfully synthesised on a Mo substrate by using chemical vapor deposition (CVD). A scratch test was performed to measure the adhesion strength of the TiB2 ceramic coatings to the Mo substrate. The results indicated good adhesion between the two materials; the adhesion strength was 125 mN. Furthermore, high-temperature oxidation tests indicated that the CVD TiB2 ceramic coating protected the Mo substrate against oxidation up to 900 ℃. Isothermal oxidation experiments revealed that the Mo substrate covered with a 13-μm-thick TiB2 ceramic coating was protected against oxidation for a duration of 5 h. The oxidation kinetics followed a parabolic law for the first 2.5 h and a linear law in the next 2.5 h.

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