金刚石

To get rid of the usual assumption that temperature field in diamond water of substrate is uniform or linear so as to make the simulation results closer to the actual conditions under which the diamond water can be fabricared, the plasma jet from a plasma torch controlled by DC electromagnetic field was introduced in simulation.

为了使模拟更接近于金刚石膜的真实制备环境，本文取消了以往对金刚石膜或基体内的温度场常作的均匀或线性的人为假设，而采用对从磁控直流等离子体炬内喷射出的射流仿真计算结果。

The optics microscope, X-ray diffractometer and different...

利用光学显微镜、X射线衍射仪和差热分析仪对不同金刚石的晶形、晶体结构和抗氧化性能进行了研究，并与同样工艺条件下合成的不含硼金刚石进行对比，对某些实验现象做了讨论。

In the single crystal of C60 with a FCC structure,positron mainly appears outside the C60 molecule.The main annihilation space is the interspace between molecules.The calculated positron bulk lifetime in C60 is 352ps, which agrees with experiment value of 356ps in literature.In carbon nanotube bundles with different dimeters,as the diameter of carbon nanotubes increases,the main space where positron appears changes from the interspace of carbon tubes to the space inside carbon tubes,the radio between positron annihilation with valence eletrons and core eletrons becomes larger,the positron bulk lifetime in carbon nanotube increase rapidly first and come to be a constant at the end.The calculated positron lifetime of carbon nanotube with a dimeter of 0.8～1.6ns is 332～470ps,which agrees with the experiment value of 394ps.Positron annihilation has been studied in widly used compound semiconductors.

计算结果表明：在片层结构的石墨晶体中，正电子主要在石墨层间的空隙中湮没，计算出的石墨中的正电子寿命为208 pS，与文献中的实验结果215 ps符合很好；在金刚石单晶中，正电子主要在碳原子之间的空隙中存在并发生湮没，计算出的金刚石中的正电子寿命为115 ps，文献中的实验结果110 ps左右符合；在面心立方结构的C60晶体中，正电子主要在C60分子球壳内外侧及分子之间存在，C60球形分子中心正电子分布很少，正电子的湮没区域集中在C60分子之间的空隙区域，计算出的C60中的正电子寿命为352 ps与文献中的实验结果356ps相符合；对于不同管径碳米管束中的正电子分布，随着碳纳米管直径的增加，碳纳米管束中的正电子由主要在碳纳米管管间的区域出现转变为主要在碳纳米管管内中心的区域出现：碳纳米管束中的正电子与碳原子的价电子的湮没概率变得越来越大，与核心电子的湮没概率变得越来越小；碳纳米管束中正电子的湮没寿命先迅速增大，而后趋于一定值。

The dung beetle is selected as bionic prototype in this paper to design the working layer of an impregnated diamond bit,which makes the bottom surface always keep the same non-smooth shape and makes the bionic bit maintain a high penetration rate and long-life...

以蜣螂为仿生原形，设计孕镶金刚石钻头的工作层，使工作层底唇面始终具有相同的非光滑形态，始终保持高钻速和长寿命，突显出仿生金刚石钻头的高效率、耐磨和减阻特点。

It is shown that the low potential barrier at the interface is the major cause of the enhancing effects instead of the negative surface electron affinity of the coating.

发明一项超薄类金刚石薄膜在硅微尖锥顶端的精确定位沉积技术，研制出带控制栅极类金刚石薄膜尖端阵列真空微电子源。

The experimental equipments and method for synthesizing ultrafine diamonds have been set up. The most appropriate conditions for the synthesis have been explored elementally. The relatively pure ultrafine diamond powders have been acquired

建立了爆轰合成超细金刚石的实验设备和手段，初步探索了合成金刚石的最适宜条件和炸药配比，并得到了纯度较高的超细金刚石粉。

The thickness of diamond-like film deposited on monocrystalline silicon substrate was measured by elliptically polarized light. According to the result, the film distributes over the whole surface of substrate randomly.

用椭圆偏振法测量了单晶硅基体上沉积的类金刚石薄膜，同时从所测得的膜厚值中，发现运用该沉积装置所沉积的类金刚石膜在基片表面上的厚度值呈随机分布状态。

It has been proved that the pressure and temperature of the synthetic room are fluetuant, that is to say the diamond synthesizing point is excursive, when the diamond is synthesized at high temperature and high pressure.

理论分析和生产实践都证明，在高温高压合成金刚石过程中合成腔体的压力和温度随着合成时间的延长而不断变化，即金刚石生长的工作点是漂移的。

It has been proved that the pressure and temperature of the synthetic room are fluctuant, that is to say that the diamond synthesizing point is excursive, when the diamond was synthesized at high temperature and high pressure.

理论分析和生产实践都证明，在高温高压合成金刚石过程中合成腔体的压力和温度随着合成时间的延长而不断变化，即金刚石生长的工作点是漂移的。

In practice it is difficult to measure the cutting forces and segment wear of frame saw ing because of heavy stone and huge machine.

测定金刚石框架锯锯切切削力、金刚石结块磨损和锯条变形等是十分重要也是非常困难的。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。