A novel class of high-entropy pyrochlore compounds with multiple elements at the and B site positions (A2B2O7) was successfully obtained. Powders (La1/7Sm1/7Nd1/7Pr1/7Y1/7Gd1/7Yb1/7)2(Sn1/3Hf1/3Zr1/3)2O7 nominal composition were fabricated from pure metal oxides obtained through a reaction nitrates (for A) chlorides B) sodium hydroxide during solid-state displacement (SSDR). The phase evolution...

Powder mixtures of Alumina and Chromia, blended in different proportions (1, 3, 5 10%wt) by attrition milling, were fired either pressureless sintering air hot pressing under vacuum. The resulting materials, characterized X-ray diffraction, Raman spectroscopy, SEM, hardness fracture toughness showed that all the compositions form complete solid solution which maintain same crystal structures co...

An assembly based on the deposition and pressureless sintering of successive silver layers an Aluminum Nitride heat sink is studied in this paper. Sintered act as die attach, current tracks adhesion layer ceramic. Compared to previous studies where only used additional degree freedom temperature ceramic track obtained. This allows investigation at non-conventional temperatures (>400 °C). The pr...