Local anti-ablation modification of uneven-density C/C composites with the ZrC-SiC composite ceramics

TaSi2‐modified HfB2–SiC coating: Preparation and ablation behavior

“…They are the most promising coating materials for C/C composites serving under extreme aerodynamic heating environments. [7][8][9][10][11] Among the UHTCs, HfB 2 has attracted increasing attention for anti-ablation coatings. [12][13][14] Li et al 14 prepared a HfB 2 coating on C/C composites, and they found that an HfO 2 layer formed during ablation contributed to the ablation resistance of the coating.…”

“…Ultra‐high temperature ceramics (UHTCs), composed of IVB and VB transition metal carbides, nitrides, and borides, have high melting points and ablation resistance. They are the most promising coating materials for C/C composites serving under extreme aerodynamic heating environments 7–11 . Among the UHTCs, HfB 2 has attracted increasing attention for anti‐ablation coatings 12–14 .…”

Effect on BN interphase thickness upon SiCnws@BN/HfC coating performance under impact and ablation environment

“…With the development of aerospace field, thermal structural components of a new generation of aerospace vehicles need to be used in ultra‐high temperature, oxidation, and high‐flow scouring environments, where traditional metal materials could not endure 1,2 . Carbon carbon (C/C) composites have received much attention due to their lightweight, thermal shock resistance, high thermal conductivity, friction resistance, high temperature resistance, high mechanical properties, and low coefficient of thermal expansion 3–6 . Nevertheless, rapid oxidation under high temperatures and oxidized environments extremly limmited the applications of C/C composites on aerospace vehicles thermal components 7,8 …”

“…1,2 Carbon carbon (C/C) composites have received much atten-tion due to their lightweight, thermal shock resistance, high thermal conductivity, friction resistance, high temperature resistance, high mechanical properties, and low coefficient of thermal expansion. [3][4][5][6] Nevertheless, rapid oxidation under high temperatures and oxidized environments extremly limmited the applications of C/C composites on aerospace vehicles thermal components. 7,8 Thermal protective coating techniques aim to achieve the oxidation resistance by physically isolating the oxidation gases from the C/C substrate.…”

Long-term oxidation of MoSi2-modified HfB2–SiC–Si/SiC–Si coating at 1700°C

“…To achieve the long-term corrosion protection of C f /C and prevent their direct contact with oxygen, coating with anti-oxidation ceramic layers is a successful technique. A good way to protect C f /C at 1500°C is to add ultra-high temperature ceramics (UHTCs) to the SiC coating, which can create flowable glass to close the defects [9,10]. Since the oxidation by-product of HfB 2 (HfO 2 ) has a high melting temperature and good thermal stability above 1200°C, HfB 2 -SiC coatings have better anti-oxidation properties than other UHTCs-SiC coatings [11].…”