Constructing self-healing ZrSi2-MoSi2 coating for C/C composites with enhanced oxidation protective ability

2018 ◽  
Vol 347 ◽  
pp. 257-269 ◽  
Author(s):  
Lu Wang ◽  
Qiangang Fu ◽  
Fengling Zhao ◽  
Zhigang Zhao
Keyword(s):  
Self Healing ◽  
Protective Ability ◽  
Mosi2 Coating ◽  
Enhanced Oxidation

Constructing self-supplying Al2O3-Y2O3 coating for the γ-TiAl alloy with enhanced oxidation protective ability

2020 ◽  
Vol 522 ◽  
pp. 146439
Author(s):  
Hao Lin ◽  
Wenping Liang ◽  
Qiang Miao ◽  
Shan Li ◽  
Zheng Ding ◽  
...  
Keyword(s):  
Tial Alloy ◽  
Protective Ability ◽  
Enhanced Oxidation ◽  
Y2o3 Coating

Effect of filler on the oxidation protective ability of MoSi2 coating for Mo substrate by halide activated pack cementation

2016 ◽  
Vol 92 ◽  
pp. 602-609 ◽  
Author(s):  
Jia Sun ◽  
Qian-Gang Fu ◽  
Li-Ping Guo ◽  
Yue Liu ◽  
Cai-Xia Huo ◽  
...  
Keyword(s):  
Pack Cementation ◽  
Protective Ability ◽  
Mosi2 Coating

scholarly journals Effect of the MoSi2 coating on operational reliability of bipropellant rocket engine

2021 ◽  
Vol 260 ◽  
pp. 03003
Author(s):  
Kun Cai ◽  
Zhen Zhang ◽  
Na Wang ◽  
Yu Hu ◽  
Fengshan Wang
Keyword(s):  
High Temperature ◽  
Liquid Film ◽  
Film Cooling ◽  
Thermal Cycle ◽  
High Speed ◽  
Rocket Engine ◽  
Operational Reliability ◽  
Rocket Engines ◽  
Self Healing ◽  
Mosi2 Coating

This present study investigated the MoSi2 coating and its effect on reliability of bipropellant rocket engine. This coating is developed to protect the chamber substrate material form oxidization under hightemperature oxidative circumstance as bipropellant engine works. The multilayer structure of the MoSi2 coating shows excellent high-temperature and thermal-cycle resistance. Its characteristic of self-healing leads to the good performance under the long-time steady working condition for rocket engines. A 25000-seconds firing test was conducted to testify the performance of MoSi2 coating under high temperature above 1400℃. In addition, the influence of coating surface morphology on liquid film cooling was fully discussed in experiment and simulation. High-speed microscopy camera was used to study the effects of Weber number on the spreading and lasting of cooling liquid-film. the simulative comparison was conducted by OpenFOAM to present different transfer-heat modes, when a droplet impinges on the high-temperature surface of MoSi2 coating. All results show that higher smoothness of the coating is suitable for liquid-film cooling, strengthening liquid film spread and heat transfer. Moreover, scanning electron microscope (SEM) was used to study the effect of Mo layer residue on the coating thermal-cycle profermance. The test results indicates that Mo layer residue significantly cause penetrating cracks of the coating and then weaken the self-healing of the coating at downstream of throat. Therefore, it is important to strictly control the thickness of Mo layer by means of matching Mo target in ion plating. Thus after properly prolonging the infiltration time, Mo layer can be silicified completely without residue.

Self-healing improvement strategy of thermally sprayed MoSi2 coating at 1773 K: from calculation to experiment

2021 ◽  
pp. 109599
Author(s):  
Dou Hu ◽  
Qiangang Fu ◽  
Lei Zhou ◽  
Bing Liu ◽  
Chunyu Cheng ◽  
...  
Keyword(s):  
Self Healing ◽  
Improvement Strategy ◽  
Mosi2 Coating ◽  
Thermally Sprayed

Autonomous self-healing polyisoprene elastomers with high modulus and good toughness based on the synergy of dynamic ionic crosslinks and highly disordered crystals

2020 ◽  
Vol 11 (41) ◽  
pp. 6549-6558
Author(s):  
Yohei Miwa ◽  
Mayu Yamada ◽  
Yu Shinke ◽  
Shoichi Kutsumizu
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Self Healing ◽  
High Modulus ◽  
Disordered Crystals ◽  
Ionic Crosslinks

We designed a novel polyisoprene elastomer with high mechanical properties and autonomous self-healing capability at room temperature facilitated by the coexistence of dynamic ionic crosslinks and crystalline components that slowly reassembled.

Congenital self-healing histiocytosis

1982 ◽  
Vol 118 (4) ◽  
pp. 267-272 ◽  
Author(s):  
E. Bonifazi
Keyword(s):  
Self Healing

Self-healing juvenile cutaneous mucinosis

1995 ◽  
Vol 131 (4) ◽  
pp. 459-461 ◽  
Author(s):  
R. Caputo
Keyword(s):  
Self Healing
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