中文摘要：

采用生物技术进行材料表面处理是极其重要和具有诱人应用前景的方法。芦荟作为常见的草本植物，富含多种活性成分。采用OM和SEM等手段主要研究在芦荟体内植入钛合金（TC4）并在TC4表面生成草酸钙晶须这一过程。合适的植入处理时间与一定的表面粗糙度对晶须的生成数量和长度起着决定作用。通过EDS分析晶须的化学成分可得到晶须的化学式为Ca（1-x）C2O4，其中x的取值范围为0．4到0．5。在扫描电镜（SEM）下观察到晶须的长度为40-100μm，直径为2．17～5-31μm。

英文摘要：

Surface treatments using bio-technology are valuable and fascinating. Aloe is a popular medicinal plant. The surface of titanium alloy （TC4） sample planted in aloe can produce oxalate whiskers. It is shown that an appropriate incubative stage and a proper surface roughness of TC4 specimens can be beneficial to the amounts and length of oxalate whiskers. By EDS spectrum the chemical formula of the whisker is determined to be Ca（1-x）C2O4, and the range ofx is between 0.4 and 0.5. By SEM observation the length of the whisker is between 40 μm and 100 μm and its diameter is between 2.17μm and 5.31 μm.