In the present work, diffusion bonding technology used for fabrication of pulsating heat pipes (PHP) in a high-vacuum, high-pressure and high-temperature furnace is discussed. Seven different configurations of PHPs were manufactured, subjected to different fabrication parameters. PHPs with 10 and 26 parallel channels of circular and square cross-sectional areas were constructed. In addition, a PHP with a novel cross-sectional channel geometry, composed by a circular area with lateral grooves, which is easily fabricated by the present technology, is proposed. The deformation of the geometries of the channel cross sections was observed. The square channel PHP showed large deformation, while the deformations of the circular ones, including the new proposed geometry, were small. The distribution of the PHPs along the matrix in a single bonding cycle showed to be a very important parameter: Those PHPs produced in parallel presented some deformation and leakage problems, while those made by stacking mode did not presented any leakage. Scanning electron microscopy and optical microscopy were used to assess that diffusion bonding is a very suitable and promising technology for the fabrication of PHPs. The thermal tests showed that the grooved circular channel PHP presents higher thermal performance.

在本工作中，讨论了用于在高真空，高压和高温炉中制造脉动热管（PHP）的扩散结合技术。根据不同的制造参数，制造了7种不同的PHP。构造了具有10和26个平行通道的圆形和方形横截面的PHP。另外，提出了一种具有新颖的横截面通道几何形状的PHP，其由具有横向凹槽的圆形区域构成，该PHP通过本技术容易制造。观察到通道横截面的几何形状的变形。方形通道PHP的变形较大，而圆形通道（包括新提议的几何形状）的变形较小。PHP在单个键合循环中沿矩阵的分布显示出一个非常重要的参数：并行生产的那些PHP存在变形和泄漏问题，而通过堆叠模式生产的那些PHP没有泄漏。扫描电子显微镜和光学显微镜被用来评估扩散结合是一种非常适合制造PHP的技术。热测试表明，带凹槽的圆形通道PHP具有更高的热性能。扫描电子显微镜和光学显微镜被用来评估扩散结合是一种非常适合制造PHP的技术。热测试表明，带凹槽的圆形通道PHP具有更高的热性能。扫描电子显微镜和光学显微镜被用来评估扩散结合是一种非常适合制造PHP的技术。热测试表明，带凹槽的圆形通道PHP具有更高的热性能。