Huaqiao University

Xipeng Xu

Jing Lu

Hui Huang

Qiufa Luo

Guoqin Huang

Yanhui Wang

Yangli Xu

Ziqing Li

Zhongwei Hu

Changcai Cui

Zhiping Xue

Dekui Mu

Ping Xiao

Yunyun Song

Yueqin Wu

Yongchao Xu

Fei Ma

Dayu Zhang

Zhongqiang Ma

Zeling Yang

A method for measuring a thickness and optical constants of a multi-layer film comprises the following steps: 1: depositing films on a substrate to form a multi-layer film; 2: measuring an ellipsometric spectrum of the multi-layer film; 3: when the film layer of the multi-layer film is the diamond film, step 41 is executed; when the film layer of the multi-layer film is the diamond-like film, steps 42, 5, and 6 are executed; 41: obtaining optical constants and a thickness of the film layer of the multi-layer film; 42: selecting a spectral region defining a transparent section of the film layer of the multi-layer film, and obtaining optical constants and a thickness of the film layer of the multi-layer film; 5: adjusting an amplitude and a width of an oscillator model according to the ellipsometric spectrum; and 6: evaluating a difference between an experimental value and a fitted value.

Method for measuring thickness and optical properties of multi-layer film

Forming an amorphous carbon layer due to lattice distortion of carbon atoms on a surface layer of a single-crystal diamond under a mechanical shear function of a hard abrasive, and generating a chemical reaction between the amorphous carbon layer on the surface layer and the reactive abrasive to achieve quickly removing carbon atoms on the surface layer of the single-crystal diamond due to a local high temperature between abrasive grains and the single-crystal diamond caused by friction at a high speed.

Method for polishing single-crystal diamond

A method of laser-curing and forming a honeycomb diamond grinding block made from fine-grained diamonds and a ceramic binding agent is provided. The method includes preparing a slurry, where components of the slurry, by mass ratios, include: 20-21 parts of photosensitive resin; 34.5-37 parts of aluminum-oxide powder; 4-5.5 parts of fine-grained diamond powder; 0.04-0.1 parts of a photoinitiator; a range of particle sizes of the fine-grained diamond powder is 6-8 μm; stirring the slurry to allow all components in the slurry to be fully mixed with each other to obtain a first printing material; feeding the first printing material into a light-curing printer to perform light-curing 3D printing to obtain a precursor of a finished product; and performing, by a high-temperature furnace, a degreasing operation and a high-temperature sintering treatment on the precursor to obtain the finished product of the honeycomb diamond grinding block.

Method of laser-curing and forming honeycomb grinding block made from fine-grained diamonds and ceramic binding agent

Carbon atoms of a single-crystal diamond and active abrasives are used to produce a chemical reaction to form carbides under a specific grinding condition of no higher than a graphitization temperature, and a hard abrasive is used to remove the carbides.

Method for grinding single-crystal diamond

A method for testing an interfacial tribochemical reaction between a diamond wafer and active metal abrasive or metal oxide abrasive is provided. A surface of a diamond indenter used in a nano scratch tester is coated with a layer of the active metal abrasive or the metal oxide abrasive with uniform and controllable thickness by magnetron sputtering, and an interface interaction between the layer of the active metal abrasive or the metal oxide abrasive and the diamond wafer is controlled by a scratch test of the diamond wafer. Chemical components of an interaction section on a surface of the diamond wafer are analyzed by the scanning probe micro Raman spectrometer.

Method for testing interfacial tribochemical reaction between abrasive and diamond wafer

Disclosed is a composite abrasive with hard core and soft shell, comprising hard abrasive core with grain diameter in a range of 0.1&#x2dc;1 &#x3bc;m and a soft oxide shell with thickness in a range of 5&#x2dc;100 nm, the grain size of the oxide of the soft oxide shell is in a range of 5&#x2dc;20 nm, the composite abrasive is obtained from aqueous solution of oxide inorganic salt precursor and the hard abrasive by dispersing, constant temperature reflux hydrolyzing, solid-liquid separating, washing and drying. The component abrasive with hard core and soft shell of the present invention can improve the manufacturing efficiency and the surface quality during the ultraprecise manufacturing of the sapphire substrate.

Composite abrasive with hard core and soft shell, manufacturing method and application method

A microbial dressing method for super abrasive tools includes a kind of microbe which is capable of consuming the bond in a certain manner is selected to perform the microbial dressing. Specifically, the microbe is inoculated and cultured in the culture medium to a certain concentration, then the dressing area of the abrasive tool is immersed into the culture liquid to remove the bond in the surface by the action of the microbe, and the control of the dressing amount is realized by controlling the microbe concentration and the soaking time. Precise dressing for super abrasive products, particularly for fine grained abrasive tools can be realized using the present method.

Method for microbially dressing a super abrasive tool

Disclosed is an ultrafine abrasive biopolymer soft polishing film having a base material, the base material including a high polymer base material formed by crosslinking, solidifying and drying a uniform mixture that include from 0.1-10 wt % of an ultrafine abrasive that is chemically coated with a coupling agent to provide a surface-modified ultrafine abrasive; from 5-15 wt % of a chemical additive for controlling dryness; and from 1-10 wt % of a biopolymer sol, wherein the coupling agent improves dispersion and holding of the surface-modified ultrafine abrasive in the high polymer base material, and a method of making the same.

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Quanzhou, China

Xipeng Xu