Kinetics of the Boride Layers Obtained on AISI 1018 Steel by Considering the Amount of Matter Involved

Coatings

Carlos Orozco-Álvarez¹  PabloA. Ruiz-Trabolsi¹  Enrique Hernández-Sánchez¹  JorgeA. Yescas-Hernández²  Rafael Carrera-Espinoza²  JulioCesar Velázquez³  NoéEliseo González-Arévalo⁴ 

[1] Departamento de Bioingeniería, Instituto Politécnico Nacional, UPIBI, Avenida Acueducto s/n Barrio La Laguna Ticomán, México City 07340, Mexico;Departamento de Ingeniería Industrial y Mecánica, Universidad de las Américas Puebla, Ex Hacienda Santa Catarina Mártir s/n, 72810 San Andrés Cholula Puebla, Mexico;Departamento de Ingeniería Química Industrial, Instituto Politécnico Nacional, ESIQIE, UPALM Edif. 7, Zacatenco, México City 07738, Mexico;Departamento de Metalurgia y Materiales, ESIQIE, Instituto Politécnico Nacional, UPALM Edif. 7, Zacatenco, México City 07738, Mexico;

关键词: boride layers;    sample size;    activation energy;    kinetics of growth;    modeling;   

DOI  :  10.3390/coatings11020259

来源: DOAJ

【 摘 要 】

Boride layers are typically used to combat the wear and corrosion of metals. For this reason, to improve our knowledge of the boriding process, this research studied the effect of the size of the treated material on the kinetics of the growth of the boride layers obtained during a solid diffusion process. The purpose was to elucidate how the layers’ growth kinetics could be affected by the size of the samples since, as the amount of matter increases, the amount of energy necessary to make the process occur also increases. Furthermore, the level of activation energy seems to change as a function of the sample size, although it is considered an intrinsic parameter of each material. Six cylindrical samples with different diameters were exposed to the boriding process for three different exposure times (1.5, 3, and 5 h). The treatment temperatures used were 900, 950, and 1000 °C for each size and duration of treatment. The results show that the layer thickness increased not only as a function of the treatment conditions but also as a function of the sample diameter. The influence of the sample size on the growth kinetics of the boride layers is clear, because the growth rate increased even though the treatment conditions (time and temperature) remained constant

【 授权许可】

Unknown