硼纤维是指在金属丝上沉积硼而形成的无机纤维。通常用氢和三氯化硼在炽热的钨丝上反应,置换出无定形的硼沉积于钨丝表面获得。属脆性材料。硼纤维一般采用化学气相沉积法(CVD)生产。作为芯材,通常使用直径为12.5 um很细的钨丝,通过反应管由电阻加热,三氯化硼(BCl3)和氢气的化学混合物从反应管的上部进口流入,被加热至1300℃左右,经过化学反应,硼层就在干净的钨丝表面上沉积,制成的硼纤维被导出,缠绕在丝筒上。
在高温烘烤过程中,棉纤维变成了碳纤维,后者再与硼溶液发生反应生成碳化硼。
The strips were later removed from the solution and heated in an oven. The heat changes the cotton fibers into carbon fibers, which react with the boron solution and produce boron carbide.
采用碳纤维和钢纤维为增强材料、硼酚醛树脂为基体,通过模压成型制得新型混杂纤维增强树脂基摩阻材料。
A new type of friction material was prepared with carbon fiber and steel fiber as reinforcements and FB polymerized phenolic as matrix resin by mould pressing technology.
玻璃纤维生产中的低硼或无硼方式:这是一个明智的决定吗?
Low or No Boron in Glass Fiber Formulation: is this a wise Decision?
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