Effects of the variations in milling time and sintering temperature on the production of mullite-ZrO2 composites

Enrique Rocha Rangel, Heberto Balmori Ramírez

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Based on reactive sintering technology, imillite-ZrO2 composites were fabricated. A powder mixture of 64% wt ZrSiO4, 18.5% wt AI and 17.5% wt Al2O3 was attrition milled for different times (0.5, 3, 6, 12 and 24 h). Precursor powder was cold isostatic pressed at 400 MPa and heat-treated in air at 1450, 1500, 1550 and 1580°C for 2 h. During firing Al oxidizes to Al2O3 completely, and ZrSiO 4 dissociation allows the production of mullite with finly dispersed ZrO2. XRD analysis shows that increases in the milling time and sintering temperature favors densification and mullitization. The influence of both milling time and sintering temperature upon the phases evolution, microstructural development and final mechanical properties, as well as the processing details are discussed in this study.

Original languageEnglish
Pages (from-to)58-63
Number of pages6
JournalJournal of Ceramic Processing Research
Volume5
Issue number1
StatePublished - 2004
Externally publishedYes

Keywords

  • Milling
  • Mullite-ZRO
  • Sintering
  • Temperature
  • Time

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