Machining parameter optimization of C/SiC composites using high power picosecond laser

Si/SiC optical coatings for C/SiC composites via gel-casting and gas silicon infiltration: Effects of carbon black content

“…carbide (C/SiC) composites have been considered in view of their outstanding performance, including the low specific density (2.65g/cm 3 ), low coefficient of thermal expansion (CTE: 2×10 -6 ·K -1 at room temperature and near zero bellow 100 K), high thermal conductivity (~125W/mK), high stiffness (220GPa) and bending strength (160MPa), very high chemical corrosion resistance, etc [1][2][3][4] . However, the short carbon fiber could be oxidized during the optical process, resulting in the roughness of the C/SiC composites (~60nm) cannot meet the demand of high optical performances.…”

Effect of Mass Transfer Channels on Flexural Strength of C/SiC Composites Fabricated by Femtosecond Laser Assisted CVI Method with Optimized Laser Power

“…Continuous fiber-reinforced ceramic matrix (CMC) composites are currently explored as new generation thermal structural materials for use in aero-engines with increased performances [1][2][3][4]. Such engines require thermal components with superior strength performance and high-precision machinings, such as combustors and turbine blades with film cooling holes [5]. To this end, C/SiC composites are promising materials with excellent thermal and mechanical properties, as well as superior ablation resistance [6].…”

“…However, only a handful of research papers dealing with laser machining of ceramic matrix composites have so far been published, in which most focus on picosecond laser. For example, Zhang et al [5] processed micro-holes in C/SiC composites by high power picosecond laser and found the processing quality to be affected by different processing parameters, including helical line width and spacing, machining time, and scanning speed. In particular, minimum helical line spacing (5 m), smaller helical line width (8 m), and optimal machining time/speed would lead to good processing quality.…”

Effect of mass transfer channels on flexural strength of C/SiC composites fabricated by femtosecond laser assisted CVI method with optimized laser power

“…Continuous ber-reinforced ceramic matrix (CMC) composites are currently explored as new generation thermal structural materials for use in aero-engines with increased performances [1][2][3][4]. Such engines require thermal components with superior strength performance and high-precision machinings, such as combustors and turbine blades with lm cooling holes [5]. To this end, C/SiC composites are promising materials with excellent thermal and mechanical properties, as well as superior ablation resistance [6].…”

“…However, only a handful of research papers dealing with laser machining of ceramic matrix composites have so far been published, in which most focus on picosecond laser. For example, Zhang et al [5] processed micro-holes in C/SiC composites by high power picosecond laser and found the processing quality to be affected by different processing parameters, including helical line width and spacing, machining time, and scanning speed. In particular, minimum helical line spacing (5 mm), smaller helical line width (8 mm), and optimal machining time/speed would lead to good processing quality.…”