In Honor of Nobel Laureate Prof. M Stanley Whittingham
| STUDY OF VARIATIONS IN MICROSTRUCTURES AND PROPERTIES OF SINTERED Ni-Ti ALLOYS ACCORDING TO LOADS APPLIED IN COMPACTION AND SINTERING TEMPERATURES AND TIMES Gabriela Araujo Gois1; Paulo Assis2; Orimar Reis3; 1UFOP/REDEMAT, Ouro Preto/MG, Brazil; 2UFOP, OURO PRETO, Ouro Preto, Brazil; 3INSTITUTO FEDERAL DE MINAS GERAIS, Ouro Preto, Brazil; PAPER: 116/Iron/Regular (Oral) OS SCHEDULED: 16:20/Tue. 28 Nov. 2023/Dreams 2 ABSTRACT: In the development of the sintering of Ni-Ti alloys, it was noted the importance of carrying out an analysis regarding the influence of compaction load factors, temperatures and sintering times on their properties, given that these alloys are raw materials for biomedical products, such as implants and prostheses that need to have a high quality standard. The present study exposes the reasons why some samples showed more porosity than others, especially it is important to highlight that such samples with more porosity had a considerable decrease in hardness and mechanical resistance. The sintering temperature adopted was 1118°C, for periods of 12h and 24h, using analytical argon 2.0, taking into account the necessary care due to the high reactivity of titanium with other chemical elements. However, it was investigated why the samples that stayed in the oven for 24 hours had more pores compared to those that lasted 12 hours. Furthermore, it was observed that the greater the load applied, the greater the compaction of the alloy and the lower the porosity after sintering. The compression loads used were 21t and 30t, showing considerable differences in the final result of the specimens. |
