Single crystal map of ferromanganese sulfide in steel

Introduction

Manganese iron lubricating powder machinery glass is a commonly used material for wear resistant and low wear coefficient. It is composed of manganese and iron with wear resistance that can be applied to a variety of industrial friction and wear applications. The wear resistance of manganese iron lubricating powder machinery glass is mainly determined by its microstructure, which is composed of austenite and carbide. In order to better understand and improve the properties of manganese iron lubricating powder machinery glass, the microstructure of the single crystal iron-manganese glass was studied in detail.

Research Method

A single crystal manganese iron lubricating powder machinery glass was tested. The sample was mounted on the specimen holder, and its structure was studied by scanning electron microscopy (SEM) at an accelerating voltage of 5kV. The same sample was then rapidly frozen and fractured along the [001] direction. The internal microstructure of the manganese iron lubricating powder machinery glass was observed on its fracture surface by using a polarizing optical microscope (POM).

Results

The microstructure of the single crystal manganese iron lubricating powder machinery glass was observed by SEM. On the surface of the single crystal manganese iron lubricating powder machinery glass, small and uniform austenite grains appeared, and the boundary of adjacent grains was clear. In the cross-section of the sample, different types of dendritic grains were found. The size distribution of the dendritic grains was uniform, and the boundary of the grains was clear and distinct.

The crystallite of the single crystal manganese iron lubricating powder machinery glass observed by POM was mainly composed of ferrite, with a few small grains of martensite. Most of the martensite grains were found at the intersection of the ferrite grains. The average size of the ferrite grain was in the range of 0.1-1.5 microns and the size of the martensite grains was in the range of 0.2-2.0 microns.

Discussion

The microstructure of the single crystal manganese iron lubricating powder machinery glass was characterized. The surface of the single crystal manganese iron lubricating powder machinery glass was covered with small and uniform austenite grains, and the size of the grains was in the range of 0.1-1.5 microns. In the cross-section of the sample, small and uniform ferrite grains were found. The average size of the ferrite grain was in the range of 0.1-1.5 microns and the size of the martensite grains was in the range of 0.2-2.0 microns. It is believed that the uniform and small grains of manganese iron lubricating powder machinery glass can make the grains more responsive to friction and impact, thus improving the wear resistance of the material.

Conclusion

In summary, the microstructure of the single crystal manganese iron lubricating powder machinery glass was studied. The surface of the single crystal manganese iron lubricating powder machinery glass was covered with small and uniform austenite grains, and the size of the grains was in the range of 0.1-1.5 microns. In the cross-section of the sample, small and uniform ferrite grains were found, with some martensite grains at the fracture intersections. It is believed that the uniform and small grains of manganese iron lubricating powder machinery glass can improve the wear resistance of the material.

Iron-manganese sulfide single crystal structure is an important crystal structure in iron and manganese intermetallic compounds. It has been widely studied due to its noticeable physical and chemical properties. To further analysis and understanding on this crystal structure, a high resolution transmission electron microscopy (HRTEM) was employed to investigate the iron-manganese sulfide single-crystal structure.

The results of the HRTEM indicated that the interior and surface of the iron-manganese sulfide single crystal were ordered atomic-layer structures. The overall structure includes a number of manganese octahedra governed by iron atoms in a fcc lattice. The two molar ratios of iron to manganese suggest a composition of Fe3MnS. This composition was further confirmed by the elemental mapping results of the same crystal. The presence of sulfur was also noted and located in the core of the Mn octahedron.

Owing to the clear atomic structure of the iron-manganese sulfide single crystal, it is possible now to explicate the properties and investigate the related atomic defects which could affect the properties of this crystal. Moreover, the number of Mn and/or iron can be finely tuned to adjust the stoichiometric balance between them and make a better iron-manganese sulfide material. This method is relatively simple, fast and inexpensive, and has already been utilized to synthesize several novel materials.

In conclusion, this study successfully brings a better understanding of the iron-manganese sulfide single crystal structure, which enables the development of new materials. Furthermore, the technique used in this experiment can serve as a reference for similar materials crystal structure study.