Ammonia Nitriding of Iron Foils

Example 11

Nitriding of an iron-based material using ammonia was evaluated. FIG. 17 is a diagram illustrating an X-ray diffraction (XRD) spectrum of example thin iron foils nitrided using ammonia in a tube furnace. Thin foils of 50-100 μm were nitride using a mixture of NH₃/H₂at 400-700° C. About 9-11% nitrogen composition was found in foils after the nitriding.

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US11859271B2. Iron nitride compositions (2024-01-02). REGENTS OF THE UNIVERSITY OF MINNESOTA [US]. Inventors: Jian-Ping Wang [US], YanFeng Jiang [US], Md Mehedi [US], Yiming Wu [US], Bin Ma [US], Jinming Liu [US], Delin Zhang [US].

Patent 2024

Ammonia Iron Nitrogen X ray diffraction

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Variable analysis

independent variables

Ammonia concentration in the gas mixture (NH3/H2)
Temperature (400-700°C)

dependent variables

Nitrogen composition in the iron foils after nitriding

control variables

Thickness of the iron foils (50-100 μm)

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