Influence of the carbonization temperature on the mechanical properties of thermoplastic polymer derived C/C-SiC composites

详细信息    查看全文

• 作者：Florian Reichert^a ; ^{florian.reichert@uni-bayreuth.de" class="auth_mail" title="E-mail the corresponding author} ; Ana M. Pé ; rez-Mas^b ; Daniel Barreda^b ; Clara Blanco^b ; Ricardo Santamaria^b ; Christian Kuttner^c ; Andreas Fery^c ; ^d ; Nico Langhof^a ; Walter Krenkel^a
• 关键词：Ceramic matrix composites ; Raman spectroscopy ; Thermoplastic precursor ; Liquid silicon infiltration
• 刊名：Journal of the European Ceramic Society
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：37
• 期：2
• 页码：523-529
• 全文大小：1952 K

文摘

Carbon/Carbon (C/C) composites derived from the thermoplastic polymer polyetherimide (PEI) were pyrolized up to 1000 °C, subsequently carbonized in inert atmosphere up to 2200 °C and afterwards infiltrated with liquid silicon. The investigation of fibers and matrix with Raman microspectroscopy revealed, that an increased carbonization temperature leads to an increased carbon order as well as an incipient stress-induced graphitization of the carbon matrix close to the fiber surfaces at 2200 °C. The derived C/C-SiC samples show a maximum flexural strength of 180 MPa with C/C composites treated at 2000 °C and monotonically increasing Young’s moduli ranging from 49 GPa with C/C preforms treated at 1600 °C up to 59 GPa after carbonization at 2200 °C. The carbon fiber strength was evaluated with a single fiber tensile test, which showed a monotonically increased Young’s modulus and a decrease of the strength after carbonization at 2200 °C.