排序方式: 共有3条查询结果,搜索用时 0 毫秒
1
1.
对Si(100)和Si(111)采用相同的酸刻蚀工艺,采用热丝化学气相沉积法(HFCVD)制备金刚石膜.用扫描电子显微镜、X线衍射仪和X线应力测试仪对样品的形貌、织构及残余应力进行检测、分析.研究结果表明:沉积3 h后,Si(100)和Si(111)基体上均生长出晶形比较完整,呈柱状晶方式生长的金刚石薄膜;此外,Si(100)金刚石膜表面分布着大量的微孔,通过调整沉积工艺可控制微孔的数量和尺寸,而Si(111)金刚石膜表面无微孔出现;2种基体所得薄膜都存在(111)织构,后者Si(111)还有一定的(110)织构;2种基体经酸刻蚀之后制得薄膜均无鼓泡剥离现象,二者的残余应力相差不大. 相似文献
2.
3.
宋玉波 《高等函授学报(自然科学版)》2006,(Z1)
Improvisation or transfer is the core of a course,based on the communicative approach. That is,the students are required to transfer what they learned in the textbook to real-life situation as far as possible. And in the present-day textbook of Middle School, the courses are organized in authentic everyday situations in which students can easily identify. So in the process of English teaching,it is very important for the teachers to set the language contexts correctly and flexibly. 相似文献
1