title: The development of porous titanium products using slip casting

authors: Xu, Qian

subjects: porous materials

abstract: An optimized titanium slurry was developed from 43 vol.% of titanium powder, 0.3 dw.% of dispersant, 0.8 dw.% of plasticizer and 0.8 dw.% of binder, mixed with a balance of distilled water, which produced a viscosity of 40 cP. It was then poured into a plaster mold to form compacts with a green density of 45%. Thermal debinding was carried out at 320 ℃ with an argon flow for 2 h, followed by vacuum sintering different samples at 1000 ℃ and 1200 ℃ for 0.5 h, respectively. The porous sintered compacts had satisfactory tensile strength with some plastic deformation. The increase in oxygen and carbon content during processing was minor. An X-ray diffraction pattern showed pure alpha titanium peaks without any indication of contamination from organic additives. The results from this investigation suggested that slip casting is a potentially low-cost, simple production route for manufacturing porous titanium products.

text: The development of porous titanium products using slip casting An optimized titanium slurry was developed from 43 vol.% of titanium powder, 0.3 dw.% of dispersant, 0.8 dw.% of plasticizer and 0.8 dw.% of binder, mixed with a balance of distilled water, which produced a viscosity of 40 cP. It was then poured into a plaster mold to form compacts with a green density of 45%. Thermal debinding was carried out at 320 ℃ with an argon flow for 2 h, followed by vacuum sintering different samples at 1000 ℃ and 1200 ℃ for 0.5 h, respectively. The porous sintered compacts had satisfactory tensile strength with some plastic deformation. The increase in oxygen and carbon content during processing was minor. An X-ray diffraction pattern showed pure alpha titanium peaks without any indication of contamination from organic additives. The results from this investigation suggested that slip casting is a potentially low-cost, simple production route for manufacturing porous titanium products.

year: 2013

title: Book review: Mates and lovers: a history of gay New Zealand

authors: Johnston, Lynda

subjects: book review

abstract: This article reviews the book: “Mates and lovers: a history of gay New Zealand”, edited by Chris Brickell.

text: Book review: Mates and lovers: a history of gay New Zealand This article reviews the book: “Mates and lovers: a history of gay New Zealand”, edited by Chris Brickell.

year: 2011

title: How Maori have been affected through the notion and practice of schooling: A theoretical analysis

authors: Williamson, Laurie Thomas

abstract: Education has always been associated according to the public with a necessary function to equip individuals to fit into society when they reach adulthood. The fact that it functions with efficiency is attributed in part to the implementation of social norms, which "impose uniformity of behaviour" (Young 2006, p. 1).

This thesis delves into how Maori have been positioned under a mainstream schooling discourse which has put them at a disadvantage since the implementation of a discourse requires the subjugation of those who are not the majority power holders to assimilate into someone else's discourse. The effect of assimilation into a mainstream discourse has political implications for Maori, as schools are the gateway towards social stratification. This thesis will look at the historical and developmental concept of schooling within a western context, moving towards the development of formal schooling in New Zealand and also look at the sociological and political impact of schooling upon Maori students.

I will also differentiate between the terms schooling and education to suggest Maori forms of educational discourse has been marginalised in favour of assimilation into a supposedly equitable rigid, formal system of schooling. I will illustrate the broader concept of education that takes place outside of schools formal boundaries as a way to contrast the level of control and regulation the government initiates within the formal schooling environment. I will also look at the way schools have been used from its colonial beginnings in New Zealand as a way to civilise or impose one cultural practice on another as a way of breaking down uncivilised beliefs and traditions.

text: How Maori have been affected through the notion and practice of schooling: A theoretical analysis Education has always been associated according to the public with a necessary function to equip individuals to fit into society when they reach adulthood. The fact that it functions with efficiency is attributed in part to the implementation of social norms, which "impose uniformity of behaviour" (Young 2006, p. 1).

This thesis delves into how Maori have been positioned under a mainstream schooling discourse which has put them at a disadvantage since the implementation of a discourse requires the subjugation of those who are not the majority power holders to assimilate into someone else's discourse. The effect of assimilation into a mainstream discourse has political implications for Maori, as schools are the gateway towards social stratification. This thesis will look at the historical and developmental concept of schooling within a western context, moving towards the development of formal schooling in New Zealand and also look at the sociological and political impact of schooling upon Maori students.

I will also differentiate between the terms schooling and education to suggest Maori forms of educational discourse has been marginalised in favour of assimilation into a supposedly equitable rigid, formal system of schooling. I will illustrate the broader concept of education that takes place outside of schools formal boundaries as a way to contrast the level of control and regulation the government initiates within the formal schooling environment. I will also look at the way schools have been used from its colonial beginnings in New Zealand as a way to civilise or impose one cultural practice on another as a way of breaking down uncivilised beliefs and traditions.

year: 2012