UHTC Composites for Hypersonic Applications

UHTC–carbon fibre composites: Preparation, oxyacetylene torch testing and characterisation

“…The 2 colour pyrometer was capable of recording temperatures from 1000 • to 3000 • C and the modified thermal imaging camera could record temperatures up to 2800 • C when combined with the neutral density filter. 2 The aim of the preliminary testing was to rank the UHTC composites according to their oxidation performance and hence the tests were carried out for 30 s and 60 s. The mass loss of the samples after oxyacetylene torch testing was recorded and the depth of erosion was determined from micro-CT images. The oxidation products were characterised using FEGSEM, EDS, XRD and micro-CT.…”

“…Even though they have been studied since the 1960s, there has been recent interest in these materials as potential candidates for thermal protection systems on hypersonic vehicles. A developmental history of UHTC materials can be found in Opeka et al 1 and they have recently been reviewed by Paul et al 2 The initial selection of UHTC materials was based on their melting temperatures, however oxidation temperature and the melting points of their oxides is, in fact, more critical. There are a number of materials with melting points over 3000 • C, whose oxides also have melting points in excess of 2500 • C, for example ZrB 2 , HfB 2 and HfC.…”

Discovering novel VC1− compounds through hybrid first-principles and evolutionary algorithms

“…A possible solution is to incorporate toughening components (e.g. carbon fiber) to form ultra-high temperature ceramic matrix composites (UHTCMCs) [8][9][10].…”

Microscopic, mechanical and thermal properties of spark plasma sintered ZrB2 based composite containing polycarbosilane derived SiC

“…Among them, ZrB 2 -SiC composite has some unique properties like outstanding high temperature structural properties, low theoretical density, high thermal and electrical conductivity and good oxidation resistance in adverse (include individually or in combination of effect of temperature, chemical reactivity, radiation, mechanical stress and wear) condition that make it a potential and promising material in structural, aerospace and other conventional fields like refractory crucible, electrode, thermal and reactor plants etc. [3][4][5][6]. It is well known that structural properties of any composite depend not only on compositions but also on other parameters like particle morphology, impurities, densification process parameters and microstructures.…”