TY - JOUR
T1 - Chemical vapor infiltration of the hexagonal boron nitride interphase for SiC fiber-Reinforced HP-Si3N4 matrix composite
AU - López Marure, A.
AU - Vincent, H.
AU - Vázquez Almaguer, A. M.
AU - García Hernández, M.
N1 - Publisher Copyright:
© 2018 The Japan Institute of Metals and Materials.
PY - 2018
Y1 - 2018
N2 - This work describes the processing of SiC fiber-reinforced Si3N4 matrix composites with boron nitride (BN) interphase. The BN interphase was processed by chemical vapor infiltration (CVI) with BF3/NH3 gaseous precursors. The BN interphase modification involved the continuous treatment of Hi-Nicalon SiC fibers. The relations between (i) the processing parameters, (ii) the mechanisms controlling the kinetics of the CVI of the BN, and (iii) the structure of the deposited BN are presented. A single-or multi-layer BN interphase can be produced depending on the CVI conditions imposed on the fibers during the continuous process. A surface reaction mechanism controlling the CVI promotes a smooth, isotropic BN coating. An anisotropic BN coating can be produced when the CVI kinetics are controlled by a mass transport mechanism. With a controlled temperature gradient, the BN interphase is then made by stacking successive isotropic and anisotropic layers.
AB - This work describes the processing of SiC fiber-reinforced Si3N4 matrix composites with boron nitride (BN) interphase. The BN interphase was processed by chemical vapor infiltration (CVI) with BF3/NH3 gaseous precursors. The BN interphase modification involved the continuous treatment of Hi-Nicalon SiC fibers. The relations between (i) the processing parameters, (ii) the mechanisms controlling the kinetics of the CVI of the BN, and (iii) the structure of the deposited BN are presented. A single-or multi-layer BN interphase can be produced depending on the CVI conditions imposed on the fibers during the continuous process. A surface reaction mechanism controlling the CVI promotes a smooth, isotropic BN coating. An anisotropic BN coating can be produced when the CVI kinetics are controlled by a mass transport mechanism. With a controlled temperature gradient, the BN interphase is then made by stacking successive isotropic and anisotropic layers.
KW - Boron nitride interphase
KW - CVI
KW - SiC fibers (Hi-Nicalon)
UR - http://www.scopus.com/inward/record.url?scp=85051014626&partnerID=8YFLogxK
U2 - 10.2320/matertrans.M2017368
DO - 10.2320/matertrans.M2017368
M3 - Artículo
AN - SCOPUS:85051014626
SN - 1345-9678
VL - 59
SP - 1310
EP - 1316
JO - Materials Transactions
JF - Materials Transactions
IS - 8
ER -