Abstract Scope |
Although monazite structured ceramics (REPO<sub>4</sub>) demonstrate exceptional thermal, chemical, and radiative properties, they are known to be challenging to process, with relatively low mechanical strength. Single-phase monazites form with larger atomic-sized lanthanides (La, Ce, Pr, Nd, Pm, Sm, Eu Gd). In this work, we explore the effects of atomic size variation on the microstructure and mechanical properties of single-phase high-entropy monazite by incorporating lanthanides that tend to form the ordered xenotime crystal structure (Tb, Dy, Ho, Er, Tm, Yb, Lu). Preliminary results indicate the formation of single-phase multicomponent monazite via direct precipitation synthesis, incorporating up to six elements (La, Ce, Eu, Gd, Tb, Dy). The phase formation, phase stability, and grain growth are characterized using X-ray diffraction and scanning electron microscopy. By experimentally clarifying the microstructural and phase stability, we present a strategic method for enhancing ceramic oxides' thermal and mechanical properties. |