公开(公告)号：CA2255001C

公开(公告)日：2005-06-28

申请号：CA2255001

申请日：1997-05-16

Applicant: TECH RESOURCES PTY LTD

Inventor： STREET ROBERT ,  VANSELOW ROBERT GORDON ,  HAY SID

IPC: B61K9/10 ,  G01N27/82 ,  G01N27/83 ,  G01N27/87

Abstract: A method and apparatus for high speed magnetic detection of surface fatigue cracks in railway rails. The magnetic material of the rail is magnetised by touch magnetisation using a permanent magnet (31), leaving a remanent magnetic field. A sensor head (30, 50) having a plurality of Hall effect sensors (32) senses stray flux generated in the vicinity of surface fatigue in the rail head by the remanent magnetic field. The sensor head (30, 50) may incorporate a proximity sensor (60) to compensate for variations in sensor height. The apparatus may be mounted on a conventional track recording vehicle (TRV) for use in routinely monitoring the surface fatigue seventies in rail along a railway.

公开(公告)号：CA2255001A1

公开(公告)日：1997-11-27

申请号：CA2255001

申请日：1997-05-16

Applicant: TECH RESOURCES PTY LTD

Inventor： HAY SID ,  VANSELOW ROBERT GORDON ,  STREET ROBERT

IPC: B61K9/10 ,  G01N27/82 ,  G01N27/83 ,  G01N27/87

Abstract: A method and apparatus for high speed magnetic detection of surface fatigue cracks in railway rails. The magnetic material of the rail is magnetised by touch magnetisation using a permanent magnet (31), leaving a remanent magnetic field. A sensor head (30, 50) having a plurality of Hall effect sensors (32) senses stray flux generated in the vicinity of surface fatigue in the rail head by the remanent magnetic field. The sensor head (30, 50) may incorporate a proximity sensor (60) to compensate for variations in sensor height. The apparatus may be mounted on a conventional track recording vehicle (TRV) for use in routinely monitoring the surface fatigue severities in rail along a railway.

公开(公告)号：BR9307665A

公开(公告)日：1999-08-31

申请号：BR9307665

申请日：1993-12-17

Applicant: UNIV WESTERN AUSTRALIA

Inventor： DONECKER PETER ,  MCCORMICK PAUL GERARD ,  STREET ROBERT ,  ROWLANDS SALLY-ANNE

IPC: A62D3/00 ,  A62D3/30 ,  A62D3/36 ,  A62D3/37 ,  A62D3/38 ,  A62D101/02 ,  A62D101/20 ,  A62D101/22 ,  A62D101/26 ,  A62D101/28 ,  B01D53/70 ,  B09B3/00

Abstract: PCT No. PCT/AU93/00660 Sec. 371 Date Aug. 16, 1995 Sec. 102(e) Date Aug. 16, 1995 PCT Filed Dec. 17, 1993 PCT Pub. No. WO94/14503 PCT Pub. Date Jul. 7, 1994A process for the treatment of toxic materials, for example, inorganic compounds, halogenated organic compounds such as polychlorinated biphenyls (PCBs), dioxin and dichlorodiphenyl trichloroethane (DDT) and chemical weapons such as Sarin and mustard. The process is based on the discovery that mechanical activation can induce chemical reactions which break down the molecular structure of toxic materials and form products which are simple, non-toxic compounds. The process involves subjecting a mixture of a toxic material and a suitable reagent to mechanical activation to produce a non-toxic end product or products. Mechanical activation is typically performed inside a mechanical mill, for example, a ball mill. Ball milling of various toxic materials with appropriate reagents was found to result in virtual total destruction of the toxic starting material.

公开(公告)号：CA2230443A1

公开(公告)日：1997-03-06

申请号：CA2230443

申请日：1996-08-28

Applicant: UNIV WESTERN AUSTRALIA

Inventor： MIAO WIE-FANG ,  MCCORMICK PAUL GERARD ,  STREET ROBERT ,  DING JUN

IPC: B22F1/00 ,  B22F9/00 ,  B22F9/04 ,  B22F9/16 ,  B22F9/20 ,  C01F7/02 ,  C01F17/00 ,  C01G9/08 ,  C01G25/02 ,  C01G49/06 ,  C04B35/10 ,  C04B35/48 ,  C04B35/50 ,  C04B35/622 ,  C04B35/626 ,  C22B5/02 ,  C22B5/04 ,  C22B15/00 ,  C22B23/02 ,  C22B61/00 ,  C22C1/04 ,  C22C33/02 ,  C22C38/08 ,  C22C1/00

Abstract: A new, cost effective process for the production of ultrafine particles which is based on mechanically activated chemical reaction of a metal compound with a suitable reagent. The process involves subjecting a mixture of a metal compound and a suitable reagent to mechanical activation to increase the chemical reactivity of the reactants and/or reaction kinetics such that a chemical reaction can occur which produces a solid nano-phase substance. Concomitantly, a by-product phase is also formed. This by-product phase is removed so that the solid nano-phase substance is left behind in the form of ultrafine particles. During mechanical activation a composite structure is formed which consists of an intimate mixture of nano-sized grains of the nanophase substance and the reaction by-product phase. The step of removing the byproduct phase, following mechanical activation, may involve subjecting the composite structure to a suitable solvent which dissolves the by-product phase, while not reacting with the solid nano-phase substance. The process according to the invention may be used to form ultrafine metal powders as well as ultrafine ceramic powders. Advantages of the process include a significant degree of control over the size and size distribution of the ultrafine particles, and over the nature of interfaces created between the solid nanophase substance and the reaction by-product phase.

公开(公告)号：CA2230443C

公开(公告)日：2009-04-07

申请号：CA2230443

申请日：1996-08-28

Applicant: UNIV WESTERN AUSTRALIA

Inventor： MCCORMICK PAUL GERARD ,  DING JUN ,  MIAO WIE-FANG ,  STREET ROBERT

IPC: B22F9/16 ,  B22F1/00 ,  B22F9/00 ,  B22F9/04 ,  B22F9/20 ,  C01F7/02 ,  C01F17/00 ,  C01G9/08 ,  C01G25/02 ,  C01G49/06 ,  C04B35/10 ,  C04B35/48 ,  C04B35/50 ,  C04B35/622 ,  C04B35/626 ,  C22B5/02 ,  C22B5/04 ,  C22B15/00 ,  C22B23/02 ,  C22B61/00 ,  C22C1/00 ,  C22C1/04 ,  C22C33/02 ,  C22C38/08

Abstract: A new, cost effective process for the production of ultrafine particles whic h is based on mechanically activated chemical reaction of a metal compound with a suitable reagent. The process involves subjecting a mixture of a metal compound and a suitable reagent to mechanical activation to increase the chemical reactivity of the reactants and/or reaction kinetics such that a chemical reaction can occur which produces a solid nano-phase substance. Concomitantly, a by-product pha se is also formed. This by-product phase is removed so that the solid nano-phase substance is left behind in the form of ultrafine particles. During mechanical activation a composite structure is formed which consists of an intimate mixture of nano-sized grains of the nan o- phase substance and the reaction by-product phase. The step of removing the by-product phase, following mechanical activation, may invol ve subjecting the composite structure to a suitable solvent which dissolves the by-product phase, while not reacting with the solid nano - phase substance. The process according to the invention may be used to form ultrafine metal powders as well as ultrafine ceramic powders . Advantages of the process include a significant degree of control over the size and size distribution of the ultrafine particles, and over thenature of interfaces created between the solid nano-phase substance and the reaction by-product phase.

公开(公告)号：AU710739B2

公开(公告)日：1999-09-30

申请号：AU6727696

申请日：1996-08-28

Applicant: UNIV WESTERN AUSTRALIA

Inventor： MCCORMICK PAUL GERARD ,  DING JUN ,  MIAO WIE-FANG ,  STREET ROBERT

IPC: B22F1/00 ,  B22F9/00 ,  B22F9/04 ,  B22F9/16 ,  B22F9/20 ,  C01F7/02 ,  C01F17/00 ,  C01G9/08 ,  C01G25/02 ,  C01G49/06 ,  C04B35/10 ,  C04B35/48 ,  C04B35/50 ,  C04B35/622 ,  C04B35/626 ,  C22B5/02 ,  C22B5/04 ,  C22B15/00 ,  C22B23/02 ,  C22B61/00 ,  C22C1/04 ,  C22C33/02 ,  C22C38/08

Abstract: A new, cost effective process for the production of ultrafine particles which is based on mechanically activated chemical reaction of a metal compound with a suitable reagent. The process involves subjecting a mixture of a metal compound and a suitable reagent to mechanical activation to increase the chemical reactivity of the reactants and/or reaction kinetics such that a chemical reaction can occur which produces a solid nano-phase substance. Concomitantly, a by-product phase is also formed. This by-product phase is removed so that the solid nano-phase substance is left behind in the form of ultrafine particles. During mechanical activation a composite structure is formed which consists of an intimate mixture of nano-sized grains of the nano-phase substance and the reaction by-product phase. The step of removing the by-product phase, following mechanical activation, may involve subjecting the composite structure to a suitable solvent which dissolves the by-product phase, while not reacting with the solid nano-phase substance. The process according to the invention may be used to form ultrafine metal powders as well as ultrafine ceramic powders. Advantages of the process include a significant degree of control over the size and size distribution of the ultrafine particles, and over the nature of interfaces created between the solid nano-phase substance and the reaction by-product phase.