title: Effect of minor titanium addition on copper/diamond composites prepared by hot forging

authors: Yang, Fei

abstract: Copper/diamond composites have great potential to lead the next generation of advanced heat sink materials for use in high-power electronic devices and high-density integrated circuits because of their potential excellent properties of high thermal conductivity and close thermal expansion to the chip materials (e.g., Si, InP, GaAs). However, the poor wettability between copper and diamond presents a challenge for synthesizing copper/diamond composites with effective metallurgical bonding and satisfied thermal performance. In this article, copper/diamond composites were successfully prepared by hot forging of elemental copper and artificial diamond powders with small amounts (0 vol.%, 3 vol.% and 5 vol.%) of titanium additives. Microstructure observation and mechanical tests showed that adding minor titanium additions in the copper/diamond composite resulted in fewer cracks in the composites’ microstructure and significantly improved the bonding between the copper and diamond. The strongest bonding strength was achieved for the copper/diamond composite with 3 vol.% titanium addition, and the possible reasons were discussed.

text: Effect of minor titanium addition on copper/diamond composites prepared by hot forging Copper/diamond composites have great potential to lead the next generation of advanced heat sink materials for use in high-power electronic devices and high-density integrated circuits because of their potential excellent properties of high thermal conductivity and close thermal expansion to the chip materials (e.g., Si, InP, GaAs). However, the poor wettability between copper and diamond presents a challenge for synthesizing copper/diamond composites with effective metallurgical bonding and satisfied thermal performance. In this article, copper/diamond composites were successfully prepared by hot forging of elemental copper and artificial diamond powders with small amounts (0 vol.%, 3 vol.% and 5 vol.%) of titanium additives. Microstructure observation and mechanical tests showed that adding minor titanium additions in the copper/diamond composite resulted in fewer cracks in the composites’ microstructure and significantly improved the bonding between the copper and diamond. The strongest bonding strength was achieved for the copper/diamond composite with 3 vol.% titanium addition, and the possible reasons were discussed.

year: 2018

title: Revitalising local democracy: A social capital analysis in the context of a New Zealand local authority

authors: Nyamori, Robert Ochoki

subjects: new public management

abstract: Using an exploratory case study, we assess whether markets and strategic performance management systems (SPMS) enhanced social capital of a local authority in New Zealand and its capacity to foster democracy. We found that SPMS enhanced the interaction among managers and between managers and residents and provided residents with opportunities to participate in local authority decision-making. Market forms of management however, promoted individualism and the pursuit of narrow departmental goals. There was increased control by managers and greater reliance on experts which diminished local people's participation (and the role of councillors) in local affairs. The pairing of contradictory discourses based on efficiency, markets and participatory democracy promoted an overly rational form of democracy inimical to a deliberative democracy. The relations between staff were in a state of continuous tension. The paper contributes to an understanding on how the interaction between the state and local authorities affects local authority social capital and the potential effects on community social capital and local democracy. This paper demonstrates a need for greater attention to the contest between different discourses in the construction and sustenance of social capital and the pursuit of democracy.

text: Revitalising local democracy: A social capital analysis in the context of a New Zealand local authority Using an exploratory case study, we assess whether markets and strategic performance management systems (SPMS) enhanced social capital of a local authority in New Zealand and its capacity to foster democracy. We found that SPMS enhanced the interaction among managers and between managers and residents and provided residents with opportunities to participate in local authority decision-making. Market forms of management however, promoted individualism and the pursuit of narrow departmental goals. There was increased control by managers and greater reliance on experts which diminished local people's participation (and the role of councillors) in local affairs. The pairing of contradictory discourses based on efficiency, markets and participatory democracy promoted an overly rational form of democracy inimical to a deliberative democracy. The relations between staff were in a state of continuous tension. The paper contributes to an understanding on how the interaction between the state and local authorities affects local authority social capital and the potential effects on community social capital and local democracy. This paper demonstrates a need for greater attention to the contest between different discourses in the construction and sustenance of social capital and the pursuit of democracy.

year: 2012-05

title: District plan implementation under the RMA: Confessions of a resource consent

authors: Day, Maxine

subjects: New Zealand

abstract: This report focuses on results from Phase 2 of PUCM - the quality of plan
implementation in six district councils selected for their range of plan quality and
capacity to plan. Only those results considered to be important for assisting the six
councils (and others) to improve implementation of their plans are included in this
report. The findings and recommendations, both specific and general, ought to be
instructive for other councils, thereby helping to improve their plans and
implementation processes. Since hapu/iwi interests formed a key component of the
research, the outcomes will help enhance their case for better consideration of their
interests when dealing with local government. As well, many of the findings and
recommendations relate to matters of governance and capacity building that require
Government action, which until done will make it difficult for councils to achieve
quality plans and implementation processes.

text: District plan implementation under the RMA: Confessions of a resource consent This report focuses on results from Phase 2 of PUCM - the quality of plan
implementation in six district councils selected for their range of plan quality and
capacity to plan. Only those results considered to be important for assisting the six
councils (and others) to improve implementation of their plans are included in this
report. The findings and recommendations, both specific and general, ought to be
instructive for other councils, thereby helping to improve their plans and
implementation processes. Since hapu/iwi interests formed a key component of the
research, the outcomes will help enhance their case for better consideration of their
interests when dealing with local government. As well, many of the findings and
recommendations relate to matters of governance and capacity building that require
Government action, which until done will make it difficult for councils to achieve
quality plans and implementation processes.

year: 2003-04-15