Sintering Analysis of CoCrMo Powders by in-Situ Dilatometry
The sintering kinetics of CoCrMo powders is investigated by dilatometry. Pre-alloyed spherical powders were axially compacted and sintered between 1300°C and 1375°C. SEM images coupled to an EDS analysis are used to assess the microstructure of sintered samples. Microhardness of the sintered samples...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2025-01-01
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| Series: | Materials Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392024000100314&lng=en&tlng=en |
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| Summary: | The sintering kinetics of CoCrMo powders is investigated by dilatometry. Pre-alloyed spherical powders were axially compacted and sintered between 1300°C and 1375°C. SEM images coupled to an EDS analysis are used to assess the microstructure of sintered samples. Microhardness of the sintered samples was also evaluated. Densification is carried out in both solid and semi-solid states. The final densification is dominated by the appearance of liquid, which fills the remaining pores. The dominant diffusion mechanisms are volume diffusion and viscous flux diffusion for the intermediate and last stages of sintering. Hardness increased as the temperature did it, too. Intermetallic compounds formed due to the liquid reaction were determined to be reached in molybdenum. The increment in hardness is attributed to densification and stresses generated by the solidification of eutectic liquid. It is concluded that the sintering of CoCrMo powders should performed between 1350 and 1375°C to obtain better mechanical properties. |
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| ISSN: | 1516-1439 |