材料科学
热喷涂
表征(材料科学)
溶液前驱体等离子喷涂
沉积(地质)
等离子体
气动冷喷涂
冶金
复合材料
涂层
纳米技术
沉积物
量子力学
生物
物理
古生物学
作者
Cecilia Bartuli,Teodoro Valente,Mario Tului
标识
DOI:10.1016/s0257-8972(02)00058-0
摘要
Abstract Refractory metal borides are the object of special interest for aerospace applications requiring properties of chemical and mechanical resistance in ultra high temperature, such as nose and leading edges of re-entry space vehicles. The main objective of the research is the fabrication and characterization of plasma sprayed zirconium diboride–silicon carbide composite coatings and free-standing components for high temperature applications. High and low pressure plasma spray in a controlled atmosphere were selected as manufacturing techniques for the deposition of ceramic coatings. Fine ZrB2 and SiC precursors were agglomerated and preconsolidated into spherical, hollow powders for better flowability and silicon carbide thermal protection during the interaction with the plasma. Coatings and free-standing tubular specimens were fabricated and tested for high temperature behaviour. Thermogravimetric analysis, surface morphology investigation and high temperature X-ray diffraction showed that the addition of approximately 25% SiC induces a mechanism of self-protection of the ceramic material during heat treatment in oxidizing environments up to approximately 2100 K.
科研通智能强力驱动
Strongly Powered by AbleSci AI