From: Msegradstudent-list <msegradstudent-list-bounces@ecn.purdue.edu> On Behalf Of Morgan, Yuan-Yu Karen Sent: Monday, November 22, 2021 4:51 PM To: msegradstudent-list@ecn.purdue.edu; msefaculty-list@ecn.purdue.edu; msepostdoc-list@ecn.purdue.edu Cc: Ku Blanco, Aury Y <akublanc@purdue.edu> Subject: [msegradstudent-list] Preliminary Exam Seminar, December 6, Monday, 9:30 AM Please consider attending this seminar: MATERIALS ENGINEERING SEMINAR "Polymer Infiltration and Pyrolysis Processing of Carbon/Carbon Composites" By Edwin Romero Purdue MSE Preliminary Exam Advisor: Professor Rodney Trice ABSTRACT The low density and high thermostability of bulk carbon make carbon fiber-reinforced carbon matrix composites a good candidate for hypersonic applications. To obtain a pure carbon matrix, a polymer matrix composite is thermally decomposed in an oxygen-free atmosphere, resulting in weight loss and a porous matrix structure. The thermomechanical properties of the porous composite can be improved using polymer infiltration and pyrolysis (PIP) processing, where infiltration and conversion of a secondary polymer causes a carbon build-up on pore walls. This simultaneously decreases the total pore volume and increases the carbon matrix density, but since a portion of the secondary polymer is gasified, some residual porosity is left behind. As a result, several cycles of PIP are needed to obtain bulk densities >90%. This review focuses on some aspects of infiltration for carbon/carbon composites that have been used to reduce densification cycles. Date: December 6, 2021 Time: 9:30 AM Place: https://purdue.webex.com/meet/rtrice Yuan-Yu Karen Morgan,Ph.D. Academic Advisor-Graduate Program School of Materials Engineering Neil Armstrong Hall of Engineering, Room 2217 765-494-4103 ymorgan@purdue.edu<mailto:ymorgan@purdue.edu>