The ceramic they experimented with was silicon nitride, a material much admired in the aerospace industry.

她们测试的陶瓷材料是氮化硅－－一种在太空工业中饱受赞誉的材料。

The result was a composite that was able to withstand twice as much pressure as unalloyed silicon nitride.

和纯氮化硅相比，其合成物能经受的压力强度翻倍。

It's made from the stuff of microchips: silicon, a layer of silicon dioxide, and on top a very thin film of silicon nitride, which is perforated by a grid of microscopic circular holes.

硅、二氧化硅层以及最上层非常薄的氮化硅薄膜，而这层薄膜被打上排成网格状的微小圆孔。