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中文摘要：
对快速生长KDP晶体（001）、（101）、（100）面分别进行压痕法显微硬度测试,实验表明KDP晶体的显微硬度具有明显的各向异性,（001）、（101）、（100）面的显微硬度分别为187、156.7、151.3kg/mm2;晶体各晶面的显微硬度呈现出显著的压痕尺寸效应,即硬度随载荷的增大而减小。实验发现,当载荷较小,在5～25g时,压痕区没有出现明显的裂纹;随着载荷的增大,在25～200g时,裂纹以辐射状扩展,压痕边缘处形成崩碎状脆裂。确定以25g作为KDP晶体显微硬度测试的最佳载荷,此载荷下所测得的硬度为其显微硬度。
英文摘要：
Potassium dihydrogen phosphate（KDP） crystal was rapidly grown by ＂point-seed＂ technique.Indentation experiments on different faces of KDP crystal were carried out at a serial of loads.The anisotropy of microhardness has been studied.The results showed that the microhardnesses of KDP crystal on（001）,（101） and（100） faces were 187,156.7,151.3kg/mm2,respectively.The hardness indentation size effect（ISE） phenomenon was also found at loads varying from 5 to 200g.The results showed that the microhardnesses decreased with increasing of load for all crystal faces.The cracks appeared and expanded in the radiation form when the loads were higher than 25g.The edges of indentation appeared cataclasms with the disintegration shape.In this paper,It was believed that 25g was the optimal load for KDP crystal.
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