Abstract: Brazing diamond grits onto steel substrate using a Ni-based filler alloy was carried out by
laser beam in an argon atmosphere. The microstructure of the interfacial region among the Diamond
grits, the filler layer and the steel substrate, were investigated by means of scanning electron
microscopes (SEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS).
Meanwhile, the formation mechanism of carbide layers was discussed. All the results indicated that
the active element chromium in the Ni-based alloy concentrated preferentially to the surface of the
grits to form a chromium-rich layer, and the hard joint between the alloy and the steel substrate is
established through a cross-diffusion of iron and Ni-based alloy.
Abstract: In this paper, two metal-bonded diamond wheels with different porosity were fabricated.
The porosity of diamond wheel without additives of pore inducers is 7% and the wheel with pore
inducers is 38%. Grinding experiments with these two grinding wheels on marbles were carried out
under different grinding conditions. Experimental results revealed that highly porous grinding
wheel has smaller grinding forces and better self-sharpening ability than the compact grinding
wheel under the same grinding conditions.
Abstract: The Ti-coated diamond and the uncoated diamond were brazed with Ni-based filler alloy
by high-frequency induction under argon atmosphere at 1050°C within 15 seconds. The interfacial
microstructures between brazed diamond and the filler alloy were analyzed by scanning electron
microscopy (SEM), energy dispersion spectrometer (EDS) and X-ray diffraction (XRD). It is
surprisedly found that Cr-carbides forms normally and compactly on the surface of Ti-coated
diamond brazed, whereas Cr-carbide forms tangentially and loosely on the surface of uncoated
diamond brazed. The abrade experiment results for the brazed diamonds show that the bond
strength between the normally formed Cr-carbide and the diamond is higher than that between
Cr-carbide and uncoated diamond brazed. Furthermore, the cause that Ti changes the morphology
of Cr-carbides on the surface of Ti-coated diamond brazed is discussed by the further tests specially
Abstract: Plenty of studies on wear mechanism of diamond grains show that the specific failure
form of single diamond grit has a close relationship with its load. Monolayer diamond grinding
wheels and samples for shearing test are prepared by a high frequency induction brazing technique
in this paper. The normal abrasion mechanism of diamond grains has been found through the
comparison between the single grain tangential load during grinding and the shearing failure-load of
the single grit of the test samples. The result shows that the dynamic strength of diamond grains is
relative to the static strength after being brazed. Most of the grains are micro-broken during
grinding, and only a few of them are pulled-out or broken-off.
Abstract: The bond in a grinding wheel cements the abrasive grains together, Among other factors,
the bond plays a predominant part in the grinding wheel performances and on the quality of
grinding results. This paper presents a literature review on organic bond grinding wheels. It
discusses the characteristic of the bond and the grinding performances of the two mainly types of
organic bond  grinding wheels: the resin bond grinding wheel and the soft-elastic grinding wheel.
This paper provide a conclusion of the studying state of organic grinding wheel, which new
studying can draw lesson from.
Abstract: To increase the manufacture efficiency of electroplated diamond tools, a nickel plating
solution containing ammonium sulphate and sodium formate was investigated. The effects of
concentration of ammonium sulphate, sodium formate and pH value on throwing power, covering
power, ability to resist Cu2+ contamination and deposit microhardness were studied. Surface
topography of deposits was also observed by SEM. Compared to watts bath, the plating solution
studied is advantageous in terms of the performance of plating solution, deposit hardness and
diamond bit behavior. Ammonium sulphate can refine deposit crystal grains and result in crystal
Abstract: The present study was undertaken to compare the hardness and transverse rupture strength
(TRS) of metal-based tooling composites containing diamonds of different grit sizes. Two kinds of
bond matrix, copper-based and iron-based, were applied in the fabrication of the composites. In the
copper-based matrix, rare earth was used as an additive. Diamonds of three different grit sizes were
incorporated into two bond matrix, thereby forming six kinds of diamond composites. SEM and EDS
were used to analyze the fractured surfaces of the composites. It was found that the diamonds of
medium grit size in the copper-based bond matrix led to the highest hardness and TRS. For the
iron-based bond matrix, however, the hardness and TRS of the composites containing the coarsest
diamonds were found to be the highest. In same bond matrix, a close relationship between TRS and
hardness was established.
Abstract: Finite element mode analysis and structure optimization of several multitude holes
structure diamond saw blades are conducted to study vibration and noise of saw blade. Result shows
multitude holes structure saw blade has lower natural frequency than conventional saw blade, which
conduces decreasing of noise radiant efficiency. Through configuration optimization, it is clear that
hole diameter, hole arrange group number and average displacement DMX of Z axes have great
effects on saw blade vibration target function. Finally, the analysis to characters of sawing force and
vibration by experiment helps to find out optimum structure of diamond saw blade with multitude
holes, more rational sawing parameter and its adaptability to work piece material.
Abstract: Large advancements have been achieved in understanding nucleation and growth of CVD
diamond, but adhesion of diamond film to substrates is poor and there is no good methods about
how to quantitative evaluation of the adhesive strength. The blister test is a method appropriate for
measuring the adhesion of CVD diamond. In this test a pressure difference is applied across a thin
film and the pressure when the film separates from substrate is measured, and the adhesive strength
of diamond thin film was calculated using analytical model. Using the finite element model, the
deflection at the center of a free-standing window sample of diamond thin films is calculated as a
function of applied pressure and the adhesive strength is obtained using the FEM. The result
indicates that finite element method-based prediction of the total energy release rate is in good
agreement with that obtained from analytical expressions and experimentally observed values.
Abstract: Ceramic is difficult to cut with normal machining method in precision intricate profile.
The grinding process with diamond abrasive wheel is an effective process to machining ceramic
materials. In this paper, a precise form-grinding method of ceramic materials with diamond
grinding wheel is introduced. The tolerance of intricate profiler precision degree by this grinding
process is less than 0.005mm. The machining process contains many techniques as high efficiency
of profiler dressing technique of diamond wheel and form grinding process of ceramic. It gives
some references on the developing of ceramic precision intricate profile machining techniques