Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation of nickel-coated titanium carbide particulates and their use in the production of reinforced iron matrix composites
Highlights Ni-coated TiC composite powders were prepared by electroless plating. Iron-based composites reinforced by TiC particles was prepared by HIP. Mechanical and wear properties were improved with the addition of Ni-coated TiC. The nickel coating promotes the formation and growth of sintering neck.
Abstract Ni-coated titanium carbide (TiC) composite powders were prepared by electroless plating (EP). Further, using hot isostatic pressing (HIP), iron matrix composites reinforced with 4wt% Ni-coated TiC particulates with relative density close to 100% were prepared. The microstructure and phase composition of the Ni-coated powders and the composites were analyzed using X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. The results showed that the TiC particles were distributed uniformly in the matrix and were free of segregation or coarsening. Compared to the TiC particles without Ni coating, the reinforced iron-based composites containing the Ni-coated particles showed higher relative densities and better mechanical properties. The density, hardness, tensile strength, and elongation were enhanced to 99.98%, 243HV, 565MPa, and 11.7%, respectively in composites containing Ni-coated TiC particles from 99.70%, 210HV, 514MPa, and 10.3%, respectively in composites that were prepared using particles without Ni coating. In addition, the mass losses in the composites containing the Ni-coated particles were reduced by 32–75% in the abrasive wear test with various vertical loads. We propose that the nickel coatings on the particulates had a beneficial effect on the microstructure and properties of the reinforced iron-based composites is due to promotion of neck formation and growth between TiC and iron powders during sintering, which enhanced the density of the sintered compact and the bonding strength between the TiC particles and the iron matrix.
Preparation of nickel-coated titanium carbide particulates and their use in the production of reinforced iron matrix composites
Highlights Ni-coated TiC composite powders were prepared by electroless plating. Iron-based composites reinforced by TiC particles was prepared by HIP. Mechanical and wear properties were improved with the addition of Ni-coated TiC. The nickel coating promotes the formation and growth of sintering neck.
Abstract Ni-coated titanium carbide (TiC) composite powders were prepared by electroless plating (EP). Further, using hot isostatic pressing (HIP), iron matrix composites reinforced with 4wt% Ni-coated TiC particulates with relative density close to 100% were prepared. The microstructure and phase composition of the Ni-coated powders and the composites were analyzed using X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. The results showed that the TiC particles were distributed uniformly in the matrix and were free of segregation or coarsening. Compared to the TiC particles without Ni coating, the reinforced iron-based composites containing the Ni-coated particles showed higher relative densities and better mechanical properties. The density, hardness, tensile strength, and elongation were enhanced to 99.98%, 243HV, 565MPa, and 11.7%, respectively in composites containing Ni-coated TiC particles from 99.70%, 210HV, 514MPa, and 10.3%, respectively in composites that were prepared using particles without Ni coating. In addition, the mass losses in the composites containing the Ni-coated particles were reduced by 32–75% in the abrasive wear test with various vertical loads. We propose that the nickel coatings on the particulates had a beneficial effect on the microstructure and properties of the reinforced iron-based composites is due to promotion of neck formation and growth between TiC and iron powders during sintering, which enhanced the density of the sintered compact and the bonding strength between the TiC particles and the iron matrix.
Preparation of nickel-coated titanium carbide particulates and their use in the production of reinforced iron matrix composites
Yi, Danqing (Autor:in) / Yu, Pengchao (Autor:in) / Hu, Bin (Autor:in) / Liu, Huiqun (Autor:in) / Wang, Bin (Autor:in) / Jiang, Yong (Autor:in)
27.03.2013
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2013
| British Library Online Contents | 2013
| British Library Online Contents | 2013
| British Library Online Contents | 2013