Ablation behaviors of Ir Al intermetallic coatings in a plasma wind tunnel

Effect of multicomponent alloy coating on high frequency plasma ablation of diamond films

“…When the aircraft speed reaches the sonic level, the thermal ablation effect must be considered, which will cause high-temperature plasma ablation on the windows and other parts [6-Corresponding author: *guoks@jihualab.ac.cn 8]. At present, high-frequency plasma wind tunnel has excellent performance such as pure flow field, long operation time and high efficiency compared with other methods, thus it has a good effect of simulating high-speed flight [9][10][11]. Diamond films will undergo graphitization transformation at high temperature and chemical reaction under the action of plasma groups, which may lead to serious ablation of diamond materials [12,13].…”

“…Diamond films will undergo graphitization transformation at high temperature and chemical reaction under the action of plasma groups, which may lead to serious ablation of diamond materials [12,13]. Multi-element alloy materials have good oxidation resistance, fatigue resistance, microstructure stability and fracture toughness, but they have not been applied to hypersonic vehicles as bulk materials due to their high relative density [11,14,15].…”

In-situ 3D shape measurement system for a high-temperature object in a plasma wind tunnel via DMD-projection laser structured light and adaptive speckle filtering

“…critical to the optimal structure design of a spacecraft thermal protection system. Usually, the high-temperature ablation test is a kind of 'pass or fail' test and the ablation changes are studied only at a single location, such as the stagnation point [1][2][3][4], by comparing the test object shapes of the beginning and ending conditions [5,6]. The contact method using an implanted optical fiber sensor to achieve the online measurement of the ablation rate for an ablative heat shield [7], proposed by Sakai et al in [7], can only give the shape change along one direction.…”