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    • 76. 发明申请
    • Laser apparatus for material processing
    • 用于材料加工的激光设备
    • US20070036184A1
    • 2007-02-15
    • US10554834
    • 2004-04-29
    • Stuart WoodsDavid ParkerAndrew AppleyardMalcolm Varnham
    • Stuart WoodsDavid ParkerAndrew AppleyardMalcolm Varnham
    • H01S3/11B23K26/00
    • H01S3/2383B23K26/064H01S3/0057H01S3/2375
    • Apparatus for material processing, which apparatus comprises a rare-earth doped fibre (1), a laser diode source (2), a short pulse laser (18) and a controller (9), wherein the rare-earth doped fibre (1) is pumped by the laser diode source (2) to provide optical radiation (10), and the optical radiation (10) emitted by the rare-earth doped fibre (1) is combined with optical radiation (11) emitted by the short pulse laser (18), the apparatus being characterised in that the controller (9) synchronizes the optical radiation (10) emitted from the rare-earth doped fibre (1) with the optical radiation (11) emitted by the short pulse laser (18) to provide a plurality of pulses (5) comprising a pre-pulse (21) and a main pulse (22), the average peak power (23) of the pre-pulse (21) being greater than the peak power (24) of the main pulse (22).
    • 用于材料处理的装置,该装置包括稀土掺杂光纤(1),激光二极管源(2),短脉冲激光器(18)和控制器(9),其中稀土掺杂光纤(1) 由激光二极管源(2)泵送以提供光辐射(10),并且由稀土掺杂光纤(1)发射的光辐射(10)与由短脉冲激光器发射的光辐射(11)组合 (18),其特征在于,控制器(9)使从稀土掺杂光纤(1)发射的光辐射(10)与由短脉冲激光器(18)发射的光辐射(11)同步到 提供包括预脉冲(21)和主脉冲(22)的多个脉冲(5),所述预脉冲(21)的平均峰值功率(23)大于所述预脉冲(21)的峰值功率(24) 主脉冲(22)。
    • 77. 发明申请
    • Support structure for radiative heat transfer
    • 辐射传热支撑结构
    • US20070014990A1
    • 2007-01-18
    • US11480863
    • 2006-07-06
    • Alan AricoAkshay WaghrayDavid Parker
    • Alan AricoAkshay WaghrayDavid Parker
    • B32B9/00
    • C23C16/045C04B35/83C04B2235/614C23C16/26C23C16/4583C23C16/46Y10T428/30
    • Method for densifying porous carbon preforms. The method including: providing an apparatus charged with at least one stack of annular porous carbon-carbon composite preforms, the preforms being separated from one another by spacers emanating from a passive heat distribution element centrally located within a cylindrical space formed by the stack of annular preforms; locating the charged apparatus in a furnace at a temperature of 950-1100° C. and a pressure of 5-40 torr; and circulating a carbon-containing gas reactant through the apparatus for 150 to 900 hours. Also, an apparatus for practicing this method. The preforms are densified with less physical damage due to the weight of the preforms being treated than are preforms made by otherwise identical processes that do not separate preforms from the preforms immediately above and below them by spacer elements comprising tabs or shelves emanating from a central passive heat distribution structural member.
    • 密实多孔碳预制棒的方法。 该方法包括:提供装有至少一个环形多孔碳 - 碳复合预成型件堆叠的装置,预成型件通过间隔件彼此分隔开,该间隔物从位于由环形堆叠形成的圆柱形空间内的被动散热元件发出 预制件 将装料装置放置在炉中,温度为950-1100℃,压力为5-40托; 并将含碳气体反应物循环通过该设备150至900小时。 另外,实施这种方法的装置。 由于待处理的预成型件的重量,预成型件的加工比由比其他相同工艺制成的预成型件更小的物理损伤致密化,而不是通过间隔元件将预成型件与预制件分离,所述间隔元件包括从中心被动 配热结构件。