Donald Paul Bishop's research while affiliated with Dalhousie University and other places

... In recent years, with the rapid development of industry, researchers have devoted increasing attention to light structural materials which have higher specific strength. Among them, Al-Cu alloys are widely used in the automotive industry and aerospace field because of their high specific strength and good fracture toughness [1,2]. As cast alloys, Al-Cu alloys are not subject to any deformation processes, which can reduce production costs in the manufacturing process. ...

... In recent decades, Al-based PM materials have been developed to expand the application of the automobile field [4][5][6]. Efforts have largely addressed the development of PM counterparts to wrought or cast alloys that span a broad range of properties [7][8][9]. ...

... The proposed experiment has many common features with forging/upsetting processes [23], successfully carried out for aluminum alloys of the 2xxx and 6xxx series in a conventional press. Although there are reports of an Al-Zn-Mg-Cu alloy upsetting using an SPS press [24], the idea of material upsetting for aluminum-based composites has never been realized before. ...

... In recent decades, Al-based PM materials have been developed to expand the application of the automobile field [4][5][6]. Efforts have largely addressed the development of PM counterparts to wrought or cast alloys that span a broad range of properties [7][8][9]. ...

... In most of the different industrial applications, high surface resistance performance and thermal conductivity are great importance [1][2][3][4]. In these applications, high performance lightweight materials and robust structural requirements cause development in manufacturing methods [5][6][7][8][9][10][11]. In this context, Aluminum-Copper elements provide low weight parts and thermal conductivity with high performance microstructure. ...

... A 5% sodium hypochlorite (NaOCl) solution obtained from Loba Chemie was used as a source of chlorine. Humic acid, as a source of DOM (Li et al. 2019(Li et al. , 2016Rahman et al. 2013;Trueman et al. 2017), was purchased from Loba Chemie and used to prepare a stock solution with 350 mg/L of Total Organic Carbon (TOC) concentration. ...

... The compaction and canning processes have been researched extensively for high strength PM Al alloys [2] . Advancements in powder compaction have been made using spark plasma sintering [18] , forging [19] bi-directional microwave assisted sintering [20] , explosive shock wave [21] , and cold spray [12] . Severe plastic deformation techniques such as equal channel angular pressing [22] and high pressure torsion [13] also show promise for high strength Al alloys. ...

... Promising methods for the preparation of bulk Mg or Al-based composite hydroreactive materials are melting with additives (Cu, Fe, Sn, Ni, etc.) [55][56][57][58][59][60] or ball milling with additives with further powders compacting into pellets [53,61,62]. The known techniques for the effective coalescence of aluminum powder particles (with spherical or irregular shapes) include uniaxial compression [63,64]; cold compacting at 200-600 MPa with further sintering at 500-650 • C [65][66][67][68][69]; spark plasma sintering, commonly under 20-50 MPa and 400-600 • C [70][71][72][73]; and cold pressing at~600-8000 MPa [67,74]. The reported densities of the compacted samples achieved~94-99% for hot uniaxial compression, 92-98% for cold pressing, 98-99% for hold compacting and sintering, and over 99% after spark plasma sintering. ...