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Thermal stability of MAX phases

Journal Article


Abstract


  • The susceptibility of MAX phases to thermal dissociation at 1300-1550 ��C in high vacuum has been studied using in-situ neutron diffraction. Above 1400 ��C, MAX phases decomposed to binary carbide (e.g. TiCx) or binary nitride (e.g. TiNx), primarily through the sublimation of A-elements such as Al or Si, which results in a porous surface layer of MXx being formed. Positive activation energies were determined for decomposed MAX phases with coarse pores but a negative activation energy when the pore size was less than 1.0 ��m. The insights for tailor-design of MAX phases with controlled thermal stability and intercalated MXenes for energy storage are addressed. �� (2014) Trans Tech Publications, Switzerland.

Publication Date


  • 2014

Citation


  • Low, I. M., & Pang, W. K. (2014). Thermal stability of MAX phases. Key Engineering Materials, 617, 153-158. doi:10.4028/www.scientific.net/KEM.617.153

Scopus Eid


  • 2-s2.0-84904123299

Web Of Science Accession Number


Start Page


  • 153

End Page


  • 158

Volume


  • 617

Issue


Place Of Publication


Abstract


  • The susceptibility of MAX phases to thermal dissociation at 1300-1550 ��C in high vacuum has been studied using in-situ neutron diffraction. Above 1400 ��C, MAX phases decomposed to binary carbide (e.g. TiCx) or binary nitride (e.g. TiNx), primarily through the sublimation of A-elements such as Al or Si, which results in a porous surface layer of MXx being formed. Positive activation energies were determined for decomposed MAX phases with coarse pores but a negative activation energy when the pore size was less than 1.0 ��m. The insights for tailor-design of MAX phases with controlled thermal stability and intercalated MXenes for energy storage are addressed. �� (2014) Trans Tech Publications, Switzerland.

Publication Date


  • 2014

Citation


  • Low, I. M., & Pang, W. K. (2014). Thermal stability of MAX phases. Key Engineering Materials, 617, 153-158. doi:10.4028/www.scientific.net/KEM.617.153

Scopus Eid


  • 2-s2.0-84904123299

Web Of Science Accession Number


Start Page


  • 153

End Page


  • 158

Volume


  • 617

Issue


Place Of Publication