| 摘要 |
A hypersonic refractory material, including a refractory leading edge portion for a hypersonic vehicle and a high emissivity oxide coating adhered to the refractory leading edge portion. The high emissivity oxide coating is selected from the group including Sm2O3, Tm2O3, Yb2O3, Gd2O3, and mixtures thereof, and the refractory leading edge portion includes up to about 15 mole percent of a cation dopant selected from the group including Sm2O3, Tm2O3, Yb2O3, Gd2O3, and mixtures thereof, with the remainder being selected from the group including ZrB2, HfB2, and mixtures thereof. The high emissivity coating is formed by oxidation of cation dopant at elevated temperatures. |
| 主权项 |
1. A refractory substrate, comprising:
a refractory matrix material; and a first cation dopant material present in amounts up to about 15 mole percent and homogeneously distributed in the refractory matrix; wherein the refractory matrix material is selected from the group including ZrB2, HfB2, and mixtures thereof; and wherein the first cation dopant material is selected from the group including Sm, Tm, Yb, Gd, and mixtures thereof. |
