Patent ID: 8426032

Claim:
A composite article, comprising: a SiC ceramic part, a stainless steel part, and a connecting layer connecting the SiC ceramic part to the stainless steel part, wherein the connecting layer is formed by depositing a nickel coating on the SiC ceramic part and placing a Mo foil and a Ni foil between the SiC ceramic part and the stainless steel part with the Mo foil abutting the SiC ceramic part and the Ni foil abutting the stainless steel part, then heating and pressing the SiC ceramic part with the nickel coating, the stainless steel part, the Mo foil and the Ni foil; wherein the connecting layer includes a first transition layer adjacent to the SiC part, a Mo layer, a second transition layer, a Ni layer, and a third transition layer adjacent to the stainless steel part, and in that order; the first transition layer located between the SiC ceramic part and the Mo layer mainly includes compounds comprising Ni element and Si element, and Ni with Mo solid solutions; and the thermal expansion rate of the connecting layer gradually changes from that of the first transition layer to that of the third transition layer.