Registration Number
0224U033389,
(0123U102939)
, R & D reports
Title
Coating of modified quasi-binary Co-NbC eutectic for protecting titanium against hydrogen environment
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Встановлення впливу високотемпературного відпалу у водневому середовищі на термодинамічні та кінетичні параметри взаємодії з воднем, водневу проникність, структурно-фазовий стан та термічну стабільність захисних покриттів і об’єму матеріалу.
Head
Dekhtiarenko Volodymyr A., Доктор технічних наук
Registration Date
26-12-2024
Organization
Institute of Metal Physics. G.V. Kurdyumov of the National Academy of Sciences of Ukraine
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Determination of the kinetic parameters of the physical and chemical interaction with hydrogen of the original HTN-62 and modified quasi-binary Co-NbC eutectic (modified HTN-62) samples with protective surface layers, and determination of the possibility to achieve maximum protection of the material against the penetration of hydrogen with aim to prevent the deterioration of its operational characteristics associated with hydrogen embrittlement.
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Cobalt alloy coatings were tested in a gaseous hydrogen environment using the following procedure. In the first stage, the samples were held at room temperature and a hydrogen pressure of 0.5 MPa for 68 hours. After that, at a constant temperature, the pressure was increased to 0.6 MPa and held for an additional 50 hours. In the second stage, heating was carried out to a temperature of 400 ± 10 °C, with a holding time of 3.5 hours and subsequent cooling to room temperature. During the specified heating, the hydrogen pressure in the chamber varied from 0.6 to 0.625 MPa. After the specified heat treatment, at a hydrogen pressure in the chamber of 0.6 MPa and at room temperature, the samples were held for 20 hours. The next step was an additional holding time at room temperature and a hydrogen pressure of 2.0 MPa for 140 hours (6 days). After the specified general treatment, there were no noticeable changes in hydrogen pressure in the reactor, indicating the absence of interaction between the samples and hydrogen.
Product Description
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Boshko Oleh I.
Zahorulko Iryna V.
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2024-12-26
