形成一种混合物，其包含至少部分至约10重量％的氮化硼和硅。 使一种含有经湿化或与硅反应的成分之物体与混合物接触，及用来自于混合物的硅掺入该接触后的物体。

A mixture is formed that comprises at least some to about 10 wt% boron nitride and silicon. A body comprising a component that is wetted by or reacts with silicon is contacted with the mixture and the contacted body is infiltrated with silicon from the mixture. A method for infiltrating a body with silicon, comprising: forming a mixture comprising silicon and at least some to 10 wt% hexagonal boron nitride; contacting the body with said mixture, said body comprising a component that is wetted by or reacts with silicon; and infiltrating said contacted body with silicon from said mixture.