Measuring the Static and Dynamic Elastic Modulus in Y-TZP Ceramic Applied to Dentistry

Autor(es)

Kavashima, Lieca Hassegawa ^[1] ; Gerlin Neto, Vicente ^{[2, 1]} ; Bastos, Natalia Almeida ^[3] ; Fortulan, Carlos Alberto ^[4] ; Sanches Borges, Ana Flavia ^[3] ; Fonzar Pintao, Carlos Alberto ^[5] ; Foschini, Cesar Renato ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Dept Engn Mecan, Ave Engn Luiz Edmundo Carrijo Coube 14-01, BR-17033360 Bauru, SP - Brazil

^[2] Inst Fed Educ Ciencia & Tecnol Sao Paulo, BR-16201407 Birigui, SP - Brazil

^[3] Univ Sao Paulo, Dept Dent Endodontia & Mat Dent, Fac Odontol Bauru, Alameda Dr Octavio Pinheiro Brisola 9-75 Jardim, BR-17012901 Bauru, SP - Brazil

^[4] Univ Sao Paulo, Dept Engn Mecan, Escola Engn Sao Carlos, Ave Trabalhador Sao Carlense 400 Ctr, BR-13566590 Sao Carlos, SP - Brazil

^[5] Univ Estadual Paulista, Dept Fis, Av Engn Luiz Edmundo Carrijo Coube 14-01, BR-17033360 Bauru, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF TESTING AND EVALUATION; v. 48, n. 4, p. 3024-3034, JUL 2020.
• Citações Web of Science: 0

Resumo

Yttria tetragonal zirconia polycrystal in the form of presintered commercial blocks is used to manufacture dental prostheses through computer-aided design/computer-aided manufacturing technology. Although it presents appropriate mechanical properties, it may fail because of defects resulting from the forming, presintering, machining, or sintering processes. The aim of the current study is to evaluate the influence of the presintering process on the microhardness of presintered blocks and on the elastic modulus of sintered materials. Blocks were formed by means of uniaxial and isostatic pressing. Next, they were presintered at different temperatures and soaking times, besides being subjected to the Vickers microhardness and mechanical tests to evaluate their elastic modulus. Statistical analyses showed that the presintering time at 900 degrees C had no effect on microhardness, although it was significant at 950 degrees C. The postsintering elastic modulus ranged from 205.7 to 231.9 GPa, which is similar to the range recorded in the literature. The presintering process had no influence on the postsintering mechanical resistance results. (AU)

• Processo FAPESP: 16/23910-0 - Fabricação de filmes cerâmicos nano-estruturados para aplicação em sensores de gases
• Beneficiário: Cesar Renato Foschini
• Modalidade de apoio: Auxílio à Pesquisa - Regular