Effect of LiF and CaO Additions on MgAl2O4 Dynamic Behavior

Tatiana Borges Skaf; Luis Henrique Leme Louro; André Luís de Vasconcelos Cardoso; Alaelson Vieira Gomes; Marcelo Henrique Prado da Silva

doi:10.4028/www.scientific.net/MSF.798-799.195

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HomeMaterials Science ForumMaterials Science Forum Vols. 798-799Effect of LiF and CaO Additions on MgAl2O4 Dynamic...

Effect of LiF and CaO Additions on MgAl₂O₄ Dynamic Behavior

Abstract:

Lithium fluoride as well as calcium oxide were used as sintering additives to magnesium aluminate ceramics in order to provide both transparency and better densification. This work assessed the dynamic behavior of MgAl₂O₄ by performing split Hopkinson bar dynamic tests. The total amount of additives was 1.5 wt% in which the percentage of LiF and CaO varied from 0 to 100 wt% with an increment of 25 wt%. The obtained results indicated that CaO low concentrations induced low strength values to the ceramics of different compositions. By increasing the amount of CaO, the MgAl₂O₄ dynamic strengths were higher. The strain rate was reduced as the amount of CaO increased, indicating a higher trend of energy absorption corroborated by K_Ic measured values. On the other hand, the ceramic strain increased with the increment CaO additions.

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Periodical:

Materials Science Forum (Volumes 798-799)

Pages:

195-198

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.798-799.195

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Online since:

June 2014

Authors:

Tatiana Borges Skaf*, Luis Henrique Leme Louro, André Luís de Vasconcelos Cardoso, Alaelson Vieira Gomes, Marcelo Henrique Prado da Silva

Keywords:

Calcium Oxide, Dynamic Behavior, Lithium Fluoride, Magnesium Aluminate

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References

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