CAJ | 학술논문

用化学镀的方法在金刚石微粉表面制备 Ni-P 合金层,使其表面产生金属化。实验使用的金刚石粒度尺寸为30~40μm,Ni-P 合金层使金刚石质量增加30%左右,镀层中磷的质量分数约为7%。用扫描电子显微镜和 X 射线衍射仪对不同热处理温度下的试样镀层进行了微观形貌和组织结构的研究。结果表明：在一定范围内,随热处理温度的升高,镀层表面变得更加平滑；经400℃热处理后,镀层表面平滑度最高；500℃热处理后,镀层表面粗糙度值变大。镀值态试样经过300℃热处理后,镀层组织开始晶化,析出 Ni 相和 Ni7 P3相,镀层结构发生变化。随热处理温度的升高,晶化现象越明显,衍射峰强度越高。经过500℃热处理时,析出了 Ni3 P 相,晶化比较完全,镀层实现了由非晶态向晶态的转变过程。机械搅拌实验证明：经过400℃热处理的金刚石微粉在电镀液中至少可存放48 h。
용화학도적방법재금강석미분표면제비 Ni-P 합금층,사기표면산생금속화。실험사용적금강석립도척촌위30~40μm,Ni-P 합금층사금강석질량증가30%좌우,도층중린적질량분수약위7%。용소묘전자현미경화 X 사선연사의대불동열처리온도하적시양도층진행료미관형모화조직결구적연구。결과표명：재일정범위내,수열처리온도적승고,도층표면변득경가평활；경400℃열처리후,도층표면평활도최고；500℃열처리후,도층표면조조도치변대。도치태시양경과300℃열처리후,도층조직개시정화,석출 Ni 상화 Ni7 P3상,도층결구발생변화。수열처리온도적승고,정화현상월명현,연사봉강도월고。경과500℃열처리시,석출료 Ni3 P 상,정화비교완전,도층실현료유비정태향정태적전변과정。궤계교반실험증명：경과400℃열처리적금강석미분재전도액중지소가존방48 h。
Ni-P alloy coating was chemically plated onto diamond powder surface and then metalized. The diamond particle size was 30—40 μm.After coating,the weight increase was 30%,in which phosphorus mass fraction was about 7%.The structure and micro-morphology of the coatings heat-treated at different temperatures were studied by scanning electron microscope and X-ray diffractometer.Results showed that within a certain range,the coating surface got smoother with the increase of temperature,and that the coating surface was smoothest when treated at 400 ℃ and turned rough after treated at 500 ℃.After treated at 300 ℃,the coating organization began to crystallize with the precipitation of Ni and Ni7 P3 phase,i.e.the structure of coating had been changed.With the increase of heat treatment temperature,crystallization was more obvious and the intensity of diffraction peaks was higher.The crystallization was completed with precipitating Ni3 P phase after heat treated at 500 ℃,during which coatings were transited from amorphous to crystalline.Mechanical mixing experiments showed that diamond powders,after heat treated at 400 ℃,could be stored for at least 48 hours in the bath.