Journal of Materials Science

, Volume 29, Issue 16, pp 4385–4392 | Cite as

Creep of porcelain-containing silica and alumina

  • R. Ponraj
  • S. Ramakrishna Iyer
  • V. M. Radhakrishnan


Hard porcelain ceramics find many applications because of their high hardness, high mechanical strength and moderate thermal-shock resistance. The addition of alumina as a filler to porcelain increases its strength at room temperature. In the present investigation, four-point-bend creep tests were carried out for porcelain-containing silica (SP-1) and alumina (AP-3) at 800, 900 and 1000°C. The creep data were analysed using a power-law creep, and the stress exponents were estimated. The activation energy for these two materials was found to be 45 kcal mol−1. The viscosity of the feldspar glassy phase was also determined from the creep tests. The test samples were analysed by scanning electron microscopy (SEM). The X-ray diffraction results (XRD) show that the amount of crystalline phase in the material increases after creep testing.


Alumina Viscosity Scanning Electron Microscopy Activation Energy Mechanical Strength 
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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • R. Ponraj
    • 1
  • S. Ramakrishna Iyer
    • 1
  • V. M. Radhakrishnan
    • 1
  1. 1.Department of Metallurgical EngineeringIndian Institute of TechnologyMadrasIndia

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