A method of manufacturing a polycrystalline abrasive construction comprises providing a plurality of particles of a superhard material, the particles coated with a first matrix precursor material, providing a plurality of second matrix precursor particles having an average size less than 2 micron, the second matrix precursor particles including a liquid phase sintering agent, mixing together the plurality of particles of superhard material with particles of the second matrix precursor material and consolidating and sintering the particles of superhard material and the particles of matrix precursor material. A polycrystalline abrasive construction comprises a particles of a superhard material dispersed in a matrix material comprising a material derived from a liquid phase sintering aid and chemical barrier particles having an average particle size of less than 100 nm dispersed in the matrix. Greater than 50% of the chemical barrier particles are located substantially at boundaries between superhard particles and the matrix.
一种制造多晶磨料结构的方法包括:提供多个超硬材料颗粒,颗粒上涂覆有第一基体前驱体材料;提供多个平均粒径小于2微米的第二基体前驱体颗粒,第二基体前驱体颗粒包括液相烧结剂;将多个超硬材料颗粒与第二基体前驱体材料颗粒混合在一起,并固结和烧结超硬材料颗粒和基体前驱体材料颗粒。一种多晶磨料结构包括分散在基体材料中的超硬材料颗粒,基体材料包括由液相烧结助剂衍生的材料和分散在基体中的平均粒径小于 100 纳米的
化学屏障颗粒。50%以上的
化学屏障颗粒基本上位于超硬颗粒和基体之间的边界。