title: Rapid sintering of silicon nitride foams decorated with one-dimensional nanostructures by intense thermal radiation.
abstract: Silicon nitride foams were prepared by direct foaming and subsequent rapid sintering at 1600 °C. The intense thermal radiation generated under the pressureless spark plasma sintering condition facilitated necking of Si3N4grains. The prepared foams possessed a porosity of ∼80 vol% and a compressive strength of ∼10 MPa, which required only ∼30 min for the entire sintering processes. Rapid growth of one-dimensional SiC nanowires from the cell walls was also observed. Thermodynamic calculations indicated that the vapor-liquid-solid model is applicable to the formation of SiC nanowires under vacuum.
authors.affiliation: Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden; Berzelii Center EXSELENT on Porous Materials, Stockholm University, S-106 91 Stockholm, Sweden.
authors.forename: Duan
authors.initials: D
authors.lastname: Li
authors.affiliation: Dipartimento di Ingegneria Industriale, University of Padova, Via Marzolo 9, I-35131 Padova, Italy.
authors.forename: Elisângela
authors.initials: E
authors.lastname: Guzi de Moraes
authors.affiliation: Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden; Berzelii Center EXSELENT on Porous Materials, Stockholm University, S-106 91 Stockholm, Sweden.
authors.forename: Peng
authors.initials: P
authors.lastname: Guo
authors.affiliation: Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden; Berzelii Center EXSELENT on Porous Materials, Stockholm University, S-106 91 Stockholm, Sweden.
authors.forename: Ji
authors.initials: J
authors.lastname: Zou
authors.affiliation: Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden; College of Materials and Mineral Resources, Xi'an University of Architecture and Technology, 710055 Xi'an, People's Republic of China.
authors.forename: Junzhan
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Dipartimento di Ingegneria Industriale, University of Padova, Via Marzolo 9, I-35131 Padova, Italy; Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16801, USA.
authors.forename: Paolo
authors.initials: P
authors.lastname: Colombo
authors.affiliation: Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden; Berzelii Center EXSELENT on Porous Materials, Stockholm University, S-106 91 Stockholm, Sweden.
authors.forename: Zhijian
authors.initials: Z
authors.lastname: Shen
keywords: foam; nanowire; silicon nitride; spark plasma sintering; thermodynamics