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The resultant increase in outlays for processing, as well as for materials, raises issues in holding down costs.
To examine a wide variety of potential drilling situations, the drill bit materials were conventional cemented carbide tool alloys, diamond coated cemented carbide tool alloys, and polycrystalline diamond (PCD).
A new tool material, TiB2 ceramics, was also tested.
Table 2 Comparison of drill materials and characteristics Tool material Material hardness Tool life, number of holes Hole quality and typical features Price Solid carbide, Standard twist HRA 85-95 good 60–150 Most common tools．Along the progress of tool wear, delaminiation easily occurs at the outlet side of the holes.
Acknowledgments This study was supported by the Grant-in-Aid for Scientific Research (KAKENHI) by the Ministry of Education, Culture, Sports, Science and Technology, and the Gifu Research and Development Foundation, Japan.

Evaluation of the residual stress in the cold spray technique using Smooth Particle Hyrodynamics modelling and neutron diffraction Michael Saleh1,a, Vladimir Luzin2,b, Kevin Spencer3,c 1 Institute of Materials Engineering, Australian Nuclear Science and Technology Organisation.
Australia 2 The Bragg Institute, Australian Nuclear Science and Technology Organisation. , Locked Bag 2001, Kirrawee DC, NSW, 2232.
Introduction Cold spray (CS) is a material deposition technique where metal powder particles are accelerated up to speeds of 500-1000m/s by a stream of carrier gas, and the materials are subsequently bonded to the surface of the metallic substrate upon impact.
The noticeable peak broadening in the materials of coating in comparison with material of substrate suggest most probably accumulation of some significant microstress in cold spray particles after deposition.
Since the model constants, together with elastic properties of materials, fully determine the stress state of the elastic system, this can demonstrates the model’s ability to consider both geometric and material factors.

Chinese Journal of Applied Ecology, 2001, pp.701-705
Protection Forest Science and Technology, 2005, pp. 24-27
Journal of Northeast Forestry University, 2003, pp. 101-102
Geography and Geo-Information Science, 2006, pp. 46-49
Scientific and Technical Report,2002,Australia: Defense Science and Technology Organization

The material characteristics of the laterite used in the model slope are shown in the table 1 and table 2, and the sizes of the model slope are shown in Fig. 1and Fig. 2.
Acknowledgements This work was financially supported by the Country Natural science Foundation of China (51269006, 51168022) and Yunnan Education Department Natural Science Foundation (2011Y354).
Chinese Journal of Geotechnical Engineering.Vol.20, n. 3(1998) [2] Chongxi Shi.
Master's thesis of Kunming University of Science and Technology. 2011 [3] Qingtao Bi, Guoping Jiang, Shuyun Ding.
Journal of Shenzhen University Science And Engineering, Vol. 30, n.1(2013)

Eq.2 shows the film thickness equation at point of engagement M, in this equation, h is film thickness, Q is equispaced normal pressure, G is material parameter, is velocity parameter, is loading parameter.
*This item is financed by The Project Supported by Natural Science Basic Research Plan of China ( 51175419/E050201).
*This research was supported by Shaanxi province "13115" science and technology innovation project of great science and technology special (2008ZDKG-28 ).
*This research is supported by Shaanxi Provincial Department of Education Science Research Program ( 2010JK742 ).
Kahraman, “Load-Independent Spin Power Losses of a Spur Gear Pair: Model Formulation,” Journal of Tribology, Vol. 131, Transactions of the ASME, pp. 022201-1 – 022201-11, 2009

Mahoney, eds.), ASM International, Materials Park, OH, 2007
Mahoney, eds.), ASM International, Materials Park, OH, 2007, pp. 309 – 350
Sanders, ed.), Key Engineering Materials, Vol. 433, 2009, pp. 135-41
McNelley, Journal of Materials Science, 2010, Vol. 45 (17), pp. 4613-20 [18] K.
McNelley, Materials Science and Engineering A, Vol.

The long-term storage of coal gangue, not only takes up a lot of land, at the same time caused by spontaneous combustion, dust and slag infiltration, which pollute the air and underground water.[1]Coal gangue is a kind of available resources, the production of new wall materials instead of clay, coal gangue sintered brick, its comprehensive utilization is one of the most effective methods.
influencing factors Effect of properties of raw materials 1.physical properties Coal gangue is composed of argillaceous shale, carbonaceous shale, sandstone, sandy shale and coal etc.[2] Shale and carbonaceous shale layered structure, black, easily weathered, easy crushing and grinding, is the best raw material for brick.
The 61 regions of China's coal gangue average caloric values of 1115.6 kcal\/kg, of which 75.41% is a super value, therefore, should be reasonable to add clay, shale and other low calorific value of material according to the properties of coal gangue and furnace heat production, heat generated by the raw materials in the controlled in optimal range.
Usually coal gangue brick General requirements for raw material maximum particle size should be less than 3mm, 0.5mm particles should be accounted for more than 60%; the maximum size of hollow brick raw material should be less than 2mm, 0.5mm particles should be accounted for more than 65%.
References [1] Bin Wu, Minying Yang:China's energy.8-11,11(2012)in Chinese [2] Linchang Mou,Yu Qiu:Journal of southeast university-natural sciences.79-81,1(2003)in Chinese [3] Junying Cui,Juncai Cui:Tile.15-16,8(2003)in Chinese [4] Jiayun Jiang,Dan Zhang:New building materials.8-10,12(2002)in Chinese [5] Xianghong Zhang,Zhaoxia Li:New building materials.26-27,4(2003)in Chinese

Introduction Leaching is a diffusion-reaction phenomenon which takes place when cementitious materials are exposed to soft water.
The studies about the resistant ability of binders containing high volume of supplementary cementitious materials on leaching are rare.
Modelling the leaching kinetics of cement-based materials——influence of materials and environment[.Cement & Concrete Composites Vol. 25(2003), p.176-185
Journal of Building Materials Vol. 10(2007), p.528-533, in Chinese
Influence of limestone addition on calcium leaching mechanisms in cement-based materials.

Therefore, the improvement of wall insulation materials is of great significance, at present, the applicability of exterior wall materials of the existing building is worthy of further study.
In addition, development and applications of new technology and new materials of the energy conservation reconstruction of the existing building including energy saving and energy consumption data analysis, constitution of design improvement program, energy conservation effect of new materials and transformation of intelligent technology application etc. are also the important foundation to achieve its sustainable development .
Development Guide to Building Materials, 2012 (3): 203-204,In Chinese [2] Promoting Green Buildings, Creating Low-carbon Livable Environment – The International Green Building and Energy Conservation Session [J].
Building Science, 2012 (5): 175-176,In Chinese [5] Xu Guangzhi, Discussion on Energy Efficiency Design of Residential Buildings [J].
Jiangxi Building Materials, 2012 (2): 39-40,In Chinese [6] Cheng Li, Liu Xiaomin, Discussion on the Urban Characteristics Updates And Leadership Decision-Making by Taking Dunhuang Bidding Scheme as Example [J].

Before an analysis of the carbon dioxide emissions from the production of magnesium we need to understand the available raw materials and processing options.
· The CO2 emissions from a magnesium plant are a strong function of the energy sources used to prepare the magnesium bearing raw materials and to reduce the raw materials to magnesium metal
· There are many different types of raw materials that are suitable for producing magnesium and processes to use a specific raw material must be tailored for that material in order to minimize CO2 emissions
Ding, The Pidgeon Process In China And Its Future, in: The Magnesium Technology 2001, J.Hryn (Ed.), TMS (The Minerals, Metals &Materials Society) 2001, 7-10
Davis, Heat transfer modeling of Global Anthropogenic Warming: submitted to Journal of Nanomaterial and Energy, 2014.