Effect of nano lanthanum oxide on the high-temperature performance of phosphate material and alumina fiber reinforced phosphate composites
Source abstract
Abstract
Abstract This study utilized phosphate composites modified with nano-La 2 O 3 . The influences of nano-La 2 O 3 on the thermal stability, phase evolution, and high-temperature load-bearing capacity of phosphate materials were investigated, as well as the high-temperature resistance and flexural strength of alumina/phosphate composites based on nano-La 2 O 3 . The results indicate that the incorporation of nano-La 2 O 3 effectively enhances the mass retention of phosphate materials, with the material exhibiting optimal overall performance at a nano-La 2 O 3 loading of 20 wt%. After heat treatment at 1,200 °C, the modified composite material retained a flexural strength of 28.1 MPa, which was significantly higher than that of the unmodified composite material. Microstructural characterization confirms that the composite undergoes a phase transformation at high temperatures, yielding a densified structure. This transformation promoted the formation of an effective thermal protection barrier composed of AlPO 4 and LaPO 4 phases. The formation of this protective layer plays a critical role in significantly improving the high-temperature load-bearing capacity and ablation performance of composite materials.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnesium Oxide Properties and Applications · Flame retardant materials and properties · Thermal Expansion and Ionic Conductivity
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Wuhan University of Technology , Wuhan , 430070 , China
Sanya Science and Education Innovation Park of Wuhan University of Technology , Wuhan , 430063 , China
Department of Mechanical Engineering , University of New Orleans , New Orleans , LA , 70148 , UAS
Funding
Hainan Provincial Natural Science Foundation of China · The Natural Science Foundation of Hubei Province
References (41)
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