Preparation and Performance of the Room‐Temperature‐Cured Heat‐Resistant Phosphate Adhesive for C/C Composites Bonding

Abstract

Carbon/carbon(C/C) composites were bonded with a phosphate adhesive prepared from H3PO4 (orthophosphoric acid) and Al(OH)3 as the matrix and Si and CuO as the inorganic fillers. The mechanical properties were tested at room temperature after the bonded specimens were treated from RT to 1500°C. The results showed that the addition of CuO could greatly improve the adhesive's mechanical properties due to the formation of CunSi (copper silicides). The shear strength of bonded specimens could be up to 8.2 MPa without heat treatment and remain above 2 MPa within the whole heat‐treatment temperature range.

A SiC whisker reinforced high-temperature resistant phosphate adhesive for bonding carbon/carbon composites

“…Its low temperature curing and stable heat-resistant properties make it the promising joining method characterized by ''one-time binding without post-treatment'', thus promoting the processes feasibility, especially when the fabrication and repair of components are needed to be done onsite where the heat treatment is not allowed or not easily carried out [22]. However, the phosphate adhesive is still brittle and the bonding strength is also not strong after heattreatment.…”

A new practical inorganic phosphate adhesive applied under both air and argon atmosphere

“…spheres. It could be seen from the spectrum that the aluminum phosphate at RT without heat-treatment was a kind of amorphous which was the optimal binding phase that could provide appropriate bonding property [9]. The amorphous phase decomposed into crystalline AlPO 4 and Al(PO 3 ) 3 after heat treatment, leading to the degradation of bonding strength at temperature range from RT to 500°C.…”

Application of Performance Technology and Blended Learning in Course Design of Students

“…As an organized activity, the performance is defined in two aspects: behaviour and value. The performance technology is to analyse "what is demanded" (Wang et al, 2015;Jia et al, 2012;Fu et al, 2014). "what is demanded" refers to the gap between now and later on the basis of the current state and future perspective, therefore, "the demanded" analysis means to present this gap and then analyse the related reason.…”