New process for improving silicon nitride cutting tools: Coating by pulsed high energy density plasma

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	New process for improving silicon nitride cutting tools: Coating by pulsed high energy density plasma
	Miao, HZ ; Shi, F ; Qi, LH ; Pan, W ; Peng, ZJ ; Yang, S ; Liu, CZ
刊名	JOURNAL OF ADVANCED MATERIALS
	2007
页码	99
关键词	HARD COATINGS FILMS FIELD
ISSN号	1070-9789
通讯作者	Miao, HZ (reprint author), Tsing Hua Univ, Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China.
中文摘要	Recently, we proposed a new technique, pulsed high energy density plasma (PHEDP), to modify the surfaces of industrial cutting tools. Using this technique, hard and wear-resistant TiN and TiCN coatings were tentatively deposited onto silicon nitride ceramic cutting tools at ambient temperature. The mechanical properties of the coatings were determined by nanoindentation and nanoscratch tests. Under optimum conditions, the maximum nanohardnesses of the TiN- and TiCN-coated tools were more than 28 GPa and 50 GPa, respectively; the Young's moduli were about 350 GPa and 300-350 GPa, respectively; the maximum critical loads measured by nanoscratch tests were more than 80 mN and 100 mN, respectively. The tribological properties were evaluated by the cutting performances of the coated tools applied in turning of hardened CrWMn steel and cast iron under industrial conditions. Compared with the uncoated Si3N4 ceramic cutting tools, the flank wear was reduced by a factor of 2-3 for TiN-coated tools and 6-8 for TiCN-coated tools when applied in turning hardened CrWMn steel, and by a factor of 2-5 for TiN-coated tools and more than 8 for TiCN-coated tools when used in turning cast iron. The excellent mechanical properties of the as-coated tools were attributed to the significantly improved microstructures. There were wide (240-330 nm) and continuously graded interfaces between the coatings and silicon nitride ceramic tool substrates, and the grain size of the coatings fell in nanometer scale (60-80 nm) with dense structures.
收录类别	SCI
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/49863]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Miao, HZ,Shi, F,Qi, LH,et al. New process for improving silicon nitride cutting tools: Coating by pulsed high energy density plasma[J]. JOURNAL OF ADVANCED MATERIALS,2007:99.
APA	Miao, HZ.,Shi, F.,Qi, LH.,Pan, W.,Peng, ZJ.,...&Liu, CZ.(2007).New process for improving silicon nitride cutting tools: Coating by pulsed high energy density plasma.JOURNAL OF ADVANCED MATERIALS,99.
MLA	Miao, HZ,et al."New process for improving silicon nitride cutting tools: Coating by pulsed high energy density plasma".JOURNAL OF ADVANCED MATERIALS (2007):99.