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, weighing and performance testing. Diamond tool sintered segment preparation includes the procedures as testing of raw materials, burden, mixture, mold assembly, weighting, feeding, loaded indented, hot... with diamond. The sintered segment of diamond tool was prepared by a following cooling, mould unloading and polished smooth. Table 1 Technical performance of UPWA powder Table 2 Chemical composition......
have thoroughly investigated the densification model of covalent ceramics with sintering additives. For example, BABINI [22] proposed a diffusion model for the oxidation of hot pressed Si3N4-Y2O3-SiO2... pressure continues to increase, accompanied by a boost in the degree of densification. These values are lower than the apparent activation energy of hot pressed Si3N4 ceramics as reported. BABINI [22......
; 文献标志码:A Microstructure and densification mechanism of Fe-Cu based diamond composite ultra thin..., arrangement of powders and green densities. Key words: diamond composite ultra thin sawing; Fe-Cu-based matrix; cold uniaxial compaction; densification 金属基金刚石复合材料工磨具有锋利,近净成型性,切削效率高等特点,已广泛应用于加工石材,陶瓷,半导体等脆硬材料......
diamond turning of aluminum single crystals, and found that the microstrain varied with the crystallography of the machined surface. ARCONA [9] systematically investigated the tool force, chip formation... simulation. In the previous study of diamond turning, the heat flux is relevant with cutting parameters such as cutting speed, cutting force and so on. Tool wear is ignored because it is very little......
control four- axis movement with 5 nm accuracy. The cutting force of X, Y and Z-axis was measured by tool dynamometer. V90° single crystal diamond tool whose back relief angle is 3° and side relief is 1...Trans. Nonferrous Met. Soc. China 22(2012) s769-s774 Wear characteristics of V shape diamond tool for micro prism pattern with Al alloys Eun-Suk PARK1, 2, Tae-Jin JE1, 2, Hwan-Jin CHOI1, 2, Eun-Chae......
mill. Finally the dried powders were pressed into cylindrical shape specimens(d20mm×40mm) at the biaxial pressure of 200MPa and sintered at 1100-1400℃ for 4h in controlled atmosphere to get the desired..., rusulting in increase of both activities; and on the other hand, brings about more lattice defects, enhancing sintering driving force, accelerating sintering densification[5-8]. After 150min, however......
; diamond tool; machining test CLC number: TG74; TG454 Document code: A 1 INTRODUCTION The demand for superhard... for machining, joining of dissimilar materials, and in other fields. Diamond is a very interesting alternative tool material, owing to its outstanding properties. The hardest material known, quite unreactive......
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热压烧结AlN-SiC复相陶瓷的致密化程卫华1,2,李晓云1,丘泰2,贾杪蕾2,张晓伟2(1.江苏省南京市南京工业大学材料科学与工程学院2.江苏省盐城市盐城纺织职业技术学院化学工程系)摘 要:研究热压烧结A1N-SiC复相陶瓷的致密化行为,探讨SiC含量及热压温度,保温时间等工艺参数对复相陶瓷致密化的影响.结果表明,当SiC含量不超过70%时,在1900℃,保温1h,压力为30MPa,氮气气氛下可以制备出致密的A1N-SiC复相陶瓷,相对密度达到了99%以上.关键词:复合材料; A1N-SiC复相......