A ZrSi2–ZrC–SiC/SiC double layer coating was prepared on the surface of carbon/carbon (C/C) composites by pack cementation. The microstructure, oxidation and thermal shock resistance of the coating were studied. These results show that the outer coating is mainly composed of ZrSi2, ZrC, SiC and Si respectively. Oxidation tests were conducted in air at 1173 K for 100 min and 1773 K for 67 h and a weight decrease of 0·37 and 0·12% were recorded. After 20 times thermal shocks between 1773 K and room temperature, the weight of the coated specimens increased by only 0·12%. The excellent thermal shock resistance is attributed to the aptness to oxidation of the minor phases distributing in the gaps among the SiC particles and the coarseness of the coating.
JacobsonNS and CurryDM: ‘Oxidation microstructure studies of reinforced carbon/carbon’, Carbon, 2006, 44, (7), 1142–1150.
2.
DhamiTL, BahlOP and AwasthyBR: ‘Oxidation-resistant carbon-carbon composites up to 1700°C’, Carbon, 1995, 33, (4), 479–490.
3.
HanJC, HeXD and DuSY: ‘Oxidation and ablation of 3D carbon-carbon composite at up to 3000°C’, Carbon, 1995, 33, (4), 473–478.
4.
ZhangY, LiH, YaoX, LiK and QiangX: ‘Oxidation resistant Si–Mo–Al coating for C/SiC coated carbon/carbon composites at high temperature’, Surf. Eng., 2012, 28, (4), 257–260.
5.
FuQG, LiHJ, LiKZ and ShiXH: ‘Microstructure and oxidation protective ability of MoSi2-SiC-Si coating toughened with SiC whiskers for carbon/carbon composites’, Surf. Eng., 2008, 24, (5), 383–387.
6.
SunC, LiH, LuoH, XieJ, ZhangJ and FuQ: ‘Effect of Y2O3 on the oxidation resistant of ZrSiO4/SiC coating prepared by supersonic plasma spraying technique for carbon/carbon composites’, Surf. Coat. Technol., 2013, 235, 127–133.
7.
ChuYH, FuQG, CaoCW, LiHJ, LiKZ and LeiQ: ‘Microstructure and oxidation resistant property of C/C composites modified by SiC-MoSi2-CrSi2 coating’, Surf. Eng., 2011, 27, (5), 355–361.
8.
HuangD, ZhangM, HuangQ, XueL, ZhongP and LiL: ‘Preparation of a double layer SiC coating and its oxidation resistance at 1773 K’, Corros. Sci., 2014, 87, 134–140.
9.
YangX, HuangQ, SuZ, ChangX, ChaiL, LiuC, XueL and HuangD: ‘Resistance to oxidation and ablation of SiC coating on graphite prepared by chemical vapor reaction’, Corros. Sci., 2013, 75, 16–27.
10.
QiangX, LiH, ZhangY, FuQ, WeiJ and TianS: ‘A modified dual-layer SiC oxidation protective coating for carbon/carbon composites prepared by one-step pack cementation’, Corros. Sci., 2011, 53, (1), 523–527.
11.
FengT, LiH, ShiX, YangX and WangS: ‘Oxidation and ablation resistance of ZrB2–SiC–Si/B-modified SiC coating for carbon/carbon composites’, Corros. Sci., 2013, 67, 292–297.
12.
YaoX, LiH, ZhangY, WuH and QiangX: ‘A SiC–Si–ZrB2 multiphase oxidation protective ceramic coating for SiC-coated carbon/carbon composites’, Ceram. Int., 2012, 38, (3), 2095–2100.
13.
RenX, LiH, ChuY, LiK and FuQ: ‘ZrB2–SiC gradient oxidation protective coating for carbon/carbon composites’, Ceram. Int., 2014, 40, (5), 7171–7176.
14.
GeβweinH, PfrengleA, BinderJR and HauβeltJ: ‘Kinetic model of the oxidation of ZrSi2 powders’, J. Therm.Anal. Calorim., 2008, 91, (2), 517–523.
15.
XieJ, LiK, LiH, FuQ and LiuL: ‘Cyclic ablation behavior of C/C–ZrC–SiC composites under oxyacetylene torch’, Ceram. Int., 2014, 40, (4), 5165–5171.
16.
PérezP, LópezMF, JiménezJA and AdevaP: ‘Oxidation behaviour of Al-alloyed ZrSi2 at 700°C’, Intermetallics, 2000, 8, (12), 1393–1398.
17.
GrigorievON, GalanovBA, LavrenkoVA, PanasyukAD, IvanovSM, KoroteevAV and NickelKG: ‘Oxidation of ZrB2–SiC–ZrSi2 ceramics in oxygen’, J. Eur. Ceram. Soc., 2010, 30, (11), 2397–2405.
18.
WeiWJ and Tsung-MingW: ‘Oxidation of carbon/carbon composite coated with SiC-(Si/ZrSi2)-ZrSi2’, Carbon, 1994, 32, (4), 605–613.
19.
Jian-FengH, Xie-RongZ, He-JunL, Xin-BoX and Ye-weiF: ‘Influence of the preparation temperature on the phase, microstructure and anti-oxidation property of a SiC coating for C/C composites’, Carbon, 2004, 42, (8–9), 1517–1521.
20.
Qian-GangF, He-JunL, Xiao-HongS, Ke-ZhiL, MinH and Guo-DongS: ‘Silicide coating for protection of C/C composites at 1873 K’, Surf. Coat. Technol., 2006, 201, 3082–3086.
21.
RenX, LiH, FuQ, ChuY and LiK: ‘Oxidation resistant graded multiphase coating for carbon/carbon composites’, Surf. Coat. Technol., 2013, 232, 821–826.
22.
FengT, LiH, ShiX, YangX, LiY and YaoX: ‘Sealing role of B2O3 in MoSi2–CrSi2–Si/B-modified SiC coating for C/C composites’, Corros. Sci., 2012, 60, 4–9.
23.
YaoX, LiH, ZhangY and WangY: ‘Oxidation and Mechanical properties of SiC/SiC–MoSi2–ZrB2 coating for carbon/carbon composites’, J. Mater. Sci. Technol., 2014, 30, (2), 123–127.
24.
ChuY, FuQ, LiH and LiK: ‘Thermal fatigue behavior of C/C composites modified by SiC–MoSi2–CrSi2 coating’, J. Alloy. Compd, 2011, 509, (31), 8111–8115.
