Lead nanoparticles were embedded in an icosahedral Al-Cu-Fe alloy by rapid solidification, forming coherent interfaces on the facets on major symmetry planes of the matrix. The lattice mismatch at the interface led to considerable strain in the matrix, which reduced the stability of the icosahedral phase in its metastable state. On annealing in the icosahedral stability temperature region, the strain in the matrix resulted in the formation of small-angle boundaries in the matrix and a change in the shape of the particles on these boundaries to round ones. Simultaneous with this, a lowering of the melting point of the lead by about 6oC occurred. The role of the interfacial energy in the melting temperature is discussed.
ASJC Scopus subject areas
- Condensed Matter Physics