Dealloying by peritectic melting
材料科学
2026-05-26 v1
摘要
Peritectic melting of Ti--Ag has been shown experimentally to form bicontinuous structures, but the mechanism remains unclear. Here we use phase-field simulations to show that these structures arise from a morphological instability of liquid film migration in three dimensions: a Ti-rich solid growing through an Ag-rich liquid film develops a branched seaweed or dendritic structure whose side branches coalesce to form handles, generating a high-genus bicontinuous topology. A sharp-interface theory predicts a solidification-front velocity and an initial ligament width that are constant in time, in contrast to liquid metal dealloying; subsequent coarsening reproduces the experimentally observed final ligament width.
引用
@article{arxiv.2605.25834,
title = {Dealloying by peritectic melting},
author = {Mingwang Zhong and Alain Karma},
journal= {arXiv preprint arXiv:2605.25834},
year = {2026}
}