用模糊层次分析法评价陶瓷的磨削加工性

应用二级模糊综合评判和层次分析相结合的方法对陶瓷材料的磨削加工性进行评价．选择影响陶瓷材料磨削加工性的性能参数和加工过程/输出参数作为模糊综合评判的因素集，建立因素之间的递阶层次结构，利用Snnty1-9标度法对各因素进行两两比较构造判断矩阵，通过计算判断矩阵的特征向量确定各因素的相对权重．然后分别通过一级和二级模糊综合评判，根据最大隶属度原则，确定每种陶瓷材料的磨削加工性等级．作为实例，碳化硅、氧化铝、氧化锆和氮化硅陶瓷材料的磨削加工性分别被划分为易加工、较易加工、较难加工和难加工4个等级．研究结果表明，模糊层次分析法可以考虑影响陶瓷材料磨削加工性的多种因素及因素间的相互关系，客观确定各种因素对磨削加工性的影响权重，评价结果能够细致划分陶瓷材料的磨削加工性等级．

Grindability Evaluation of Ceramics via Fuzzy AHP Method

Two-stage tuzzy comprehensive evaluation method combined with analytical hierarchy process (AHP)was applied to estimate grindability of advanced ceramics.Property parameters and machining process/ output parameters were selected to constitute alternative sets.Structural hierarchy among alternatives was estab- lished.Comparison matrixes were constituted by pair-wise comparison according to Saaty 1-9 scales.The rela- tive weights between alternatives were determined by calculating the eigenvectors of comparison matrixes.First- stage fuzzy evaluation and second-stage fuzzy evaluation were carried out.The grindability grades of each cera- mics were determined according to maximum membership degree principle.As an example,silicon carbide, alumina,zirconia and silicon nitride were classified as four grades,very easy,easy,difficult and very difficult. All influence alternatives of ceramic grindability and their relationships can be considered by fuzzy AHP evalua- tion method.The weighting coefficients of each alternatives can be objectively calculated.The grades of ceramic grindability can be classified finely.