鉴于皮带秤性能易变,皮带秤从定型到安装调试后正式启用以及日后长期使用的各个时期,其性能都需要时时处于有效监控之下。因此,皮带秤的计量控制手段也有型式评价、初始检定和后续检定、以及使用中核查等不同类型的项目。新版皮带秤国...鉴于皮带秤性能易变,皮带秤从定型到安装调试后正式启用以及日后长期使用的各个时期,其性能都需要时时处于有效监控之下。因此,皮带秤的计量控制手段也有型式评价、初始检定和后续检定、以及使用中核查等不同类型的项目。新版皮带秤国际建议O IML R 50:2014要求皮带秤的耐久性要在各个计量控制项目中得到评估。然而,国际建议并没有清晰阐明具体的耐久性测评试验程序与判据。文章对实施不同计量控制项目时的耐久性测评方式提出了相应的方法。展开更多
A non-sputtering discharge is utilized to verify the effect of replacement of gas ions by metallic ions and consequent decrease in the secondary electron emission coefficient in the discharge current curves in high-po...A non-sputtering discharge is utilized to verify the effect of replacement of gas ions by metallic ions and consequent decrease in the secondary electron emission coefficient in the discharge current curves in high-power impulse magnetron sputtering (HiPIMS). In the non-sputtering discharge involving hydrogen, replacement of ions is avoided while the rarefaction still contributes. The initial peak and ensuing decay disappear and all the discharge current curves show a similar feature as the HiPIMS discharge of materials with low sputtering yields such as carbon. The results demonstrate the key effect of ion replacement during sputtering.展开更多
文摘鉴于皮带秤性能易变,皮带秤从定型到安装调试后正式启用以及日后长期使用的各个时期,其性能都需要时时处于有效监控之下。因此,皮带秤的计量控制手段也有型式评价、初始检定和后续检定、以及使用中核查等不同类型的项目。新版皮带秤国际建议O IML R 50:2014要求皮带秤的耐久性要在各个计量控制项目中得到评估。然而,国际建议并没有清晰阐明具体的耐久性测评试验程序与判据。文章对实施不同计量控制项目时的耐久性测评方式提出了相应的方法。
基金Supported by the National Natural Science Foundation of China under Grant Nos 51301004 and U1330110the Guangdong Innovative and Entrepreneurial Research Team Program under Grant No 2013N080+1 种基金the Shenzhen Science and Technology Research Grant under Grant Nos JCYJ20140903102215536 and JCYJ20150828093127698the City University of Hong Kong Applied Research Grant under Grant No 9667104
文摘A non-sputtering discharge is utilized to verify the effect of replacement of gas ions by metallic ions and consequent decrease in the secondary electron emission coefficient in the discharge current curves in high-power impulse magnetron sputtering (HiPIMS). In the non-sputtering discharge involving hydrogen, replacement of ions is avoided while the rarefaction still contributes. The initial peak and ensuing decay disappear and all the discharge current curves show a similar feature as the HiPIMS discharge of materials with low sputtering yields such as carbon. The results demonstrate the key effect of ion replacement during sputtering.