Conventional sintering processes convert a portion of cBN to hBN which is softer than cBN which negatively affects functional properties of an alumina composite. The invention is directed to method for making an alumina-cubic boron nitride (Al2O3-cBN) composite that contains substantially no hexagonal boron nitride (hBN) by non-conventional spark plasma sintering of cBN with nano-sized alumina particles. The invention is also directed to Al2O3-cBN/Ni composites, which contain substantially no hBN, and which exhibit superior physical and mechanical properties compared to alumina composites containing higher amounts of hBN.
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机译：常规的烧结工艺将一部分cBN转换为比cBN更软的hBN，这会对氧化铝复合材料的功能性能产生负面影响。本发明涉及通过非结晶制备基本上不包含六方氮化硼（hBN）的氧化铝立方氮化硼（Al 2 O 3 -cBN）复合材料的方法。 cBN与纳米氧化铝颗粒的常规火花等离子体烧结。本发明还涉及Al 2 O 3 -cBN / Ni复合材料，该复合材料基本上不含hBN，并且与含有较高含量的氧化铝复合材料相比，具有优异的物理和机械性能。量的hBN。
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