Effect of Monolithic LaB6 on the Ablation Resistance of ZrC/SiC Coating Prepared by Supersonic Plasma Spraying for C/C Composites

Jia, Yujun; Li, Hejun; Li, Lu; Fu, Qiangang; Li, Kezhi

doi:10.1016/j.jmst.2016.06.019

Cited by 33 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12,13 Supersonic atmospheric plasma spraying (SAPS) is considered to be an effective method to deposit UHTCs coatings on different substrates, due to the high temperature of plasma arc, high velocity of spraying particle, and high deposition rate. 14,15 The temperature of plasma arc is about 10,000 K and velocity of particle is up to 600 m/s, which can be used to prepare oxidation protective coating efficiently. The sprayed coatings have dense structure and good bonding with the substrates, which indicates the brilliant applications in protective coatings.…”

Section: Introductionmentioning

confidence: 99%

Ablation mechanism and morphology evolution of the HfC-SiC coating for C/C composites deposited by supersonic atmospheric plasma spraying

Yang

Zhao

2019

Advanced Composites Letters

Self Cite

View full text Add to dashboard Cite

HfC-SiC protective coating was deposited on the surface of SiC-coated carbon/carbon composites by supersonic atmospheric plasma spraying due to the high arc temperature and the efficient deposition rate. The morphology and microstructure of the HfC-SiC coating were analyzed by X-ray diffraction and scanning electron microscopy. The results showed that Hf and Si elements distributed uniformly in the coating and the coating was dense without crack. Ablation resistance test was processed by oxyacetylene torch. During the ablation process, the sintering rate of HfO2 was slow, and more oxygen diffused into the internal coating, which caused the oxidation of the internal coating and damaged the structure of internal coating in the ablation center region. In addition, during cooling process, a new phase HfSiO4 was generated by the reaction between HfO2 and SiO2, which acted as a pinning agent to prevent the further expansion of the crack.

show abstract

Section: Introductionmentioning

confidence: 99%

Ablation mechanism and morphology evolution of the HfC-SiC coating for C/C composites deposited by supersonic atmospheric plasma spraying

Yang

Zhao

2019

Advanced Composites Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although ZrC is a promising candidate for thermal protecting coating, the combination of single ZrC (α ZrC ≈ 7.6 × 10 −6 • C) layer and C/C substrate (α C/C ≈ 1.1 × 10 −6 • C) is disadvantageous because of the vast difference between the thermal expansion coefficients (CTE) of the two materials. To resolve Coatings 2019, 9, 735 2 of 13 the problem, different efforts have been devoted to relieving the thermal stress between ZrC coating and C/C substrate [17][18][19][20][21][22][23]. After many attempts, it has been found that SiC (α SiC ≈ 4.4 × 10 −6 • C) is suitable as a transition layer and can relatively relieve the mismatch of CTE between the outer ZrC coating and inner C/C substrate.…”

Section: Introductionmentioning

confidence: 99%

A New Assistant Method for Characterizing Ablation Resistance of ZrC-SiC Dispersive Biphasic Coating on C/C Composites

Feng

Yao

et al. 2019

Coatings

View full text Add to dashboard Cite

To optimize the ablation resistance of ZrC coating, ZrC-SiC dispersive biphasic coating was prepared by chemical vapor co-deposition. The ablation resistances of the coatings were carried out by oxyacetylene flame tests. Compared with double-layered ZrC/SiC coating, the ablation resistance of ZrC-SiC coating was evaluated. On the basis of similar mass ablation rates of the two coatings, a new assistant method for characterizing the thermal protecting effect of coatings on carbon-carbon composites (C/C) composites was proposed. The thermal protecting ability of the coating was accurately reflected by the changes of hardness and elastic modulus of C/C substrate below the central region of ablated coatings before and after ablation. The ablation processes of two kinds of coatings were also discussed. The results showed that the hardness and elastic modulus of the C/C substrate protected by ZrC-SiC coating were higher than that of C/C coated with ZrC/SiC coating. The result convincingly illustrated the thermal protecting ability of ZrC-SiC coating was much better than that of ZrC/SiC coating, which attributed to the formation of Zr-Si-O glass.

show abstract

“…Up to now, a large number of efforts have been made to fabricate UHTCs-SiC coatings, and some key methods have been adopted like reactive melt infiltration (RMI), pack cementation, and supersonic plasma spraying (SPS), etc. [8][9][10][11][12][13][14]. Zhang et al [15] selected supersonic atmosphere plasma spraying (SAPS) with ZrB 2 -SiCZrC as raw materials to form ZrB 2 -SiC-ZrC coating by the high temperature of a plasma arc and the high velocity of particles.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and microstructure of ZrB2–ZrC–SiC coatings on C/C composites by reactive melt infiltration using ZrSi2 alloy

Xue

Zhou

et al. 2018

J Adv Ceram

View full text Add to dashboard Cite

ZrB 2 -ZrC-SiC ternary coatings on C/C composites are investigated by reactive melt infiltration of ZrSi 2 alloy into pre-coatings. Two different pre-coating structures, including porous B 4 C-C and dense C/B, are designed by slurry dip and chemical vapor deposition (CVD) process respectively. The coating prepared by reactive melt infiltration (RMI) into B 4 C-C presents a flat and smooth surface with a three-layer cross-sectional structure, namely interior SiC transition layer, gradient ZrB 2 -ZrC-SiC layer, and ZrB 2 -ZrC exterior layer. In comparison, the coating prepared by RMI into C/B shows a more granular surface with a different three-layer cross-sectional structure, interior unreacted B-C pre-coating layer, middle SiC layer, and exterior ZrB 2 -ZrC-ZrSi 2 layer. The forming mechanisms of the specific microstructures in two coatings are also investigated and discussed in detail.

show abstract

Effect of Monolithic LaB6 on the Ablation Resistance of ZrC/SiC Coating Prepared by Supersonic Plasma Spraying for C/C Composites

Cited by 33 publications

References 28 publications

Ablation mechanism and morphology evolution of the HfC-SiC coating for C/C composites deposited by supersonic atmospheric plasma spraying

Ablation mechanism and morphology evolution of the HfC-SiC coating for C/C composites deposited by supersonic atmospheric plasma spraying

A New Assistant Method for Characterizing Ablation Resistance of ZrC-SiC Dispersive Biphasic Coating on C/C Composites

Fabrication and microstructure of ZrB2–ZrC–SiC coatings on C/C composites by reactive melt infiltration using ZrSi2 alloy

Contact Info

Product

Resources

About