The mechanism of anti - wear and friction reduction of nanometer cacoa has been discussed and individual opinions of the nanometer particles " existing way and effects have been proposed . 1 ) the shape of the nanometer cacos particle is approximate to that of sphericity . its function is similar to that of the miniature " ball bearing " 6 、探讨了纳米碳酸钙粒子的抗磨减摩机理，对于纳米粒子在润滑油中的存在方式和作用提出了个人见解： ( 1 )纳米碳酸钙粒子近似为球形，它们起了类似微型“球轴承”的作用，从而提高了摩擦副表面的润滑性能。
