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2. 发明申请

WO9931958A9 IMPROVED METHOD FOR MAKING A METAL MATRIX COMPOSITE BODY BY A SPONTANEOUS INFILTRATION PROCESS 审中-公开
标题翻译：自发渗透法制备金属基复合材料体的改进方法
公开(公告)号：WO9931958A9
公开(公告)日：1999-11-11
申请号：PCT/US9826949
申请日：1998-12-18
申请人： LANXIDE TECHNOLOGY CO LTD , STAHLEY MATTHEW E , MCCORMICK ALLYN L
发明人： STAHLEY MATTHEW E , MCCORMICK ALLYN L
IPC分类号： C22C1/10
CPC分类号： C22C1/1015 , B22F2998/00 , C22C1/1036 , C22C47/06 , C22C2001/1063 , C22C47/08
摘要： Improvements in processing metal matrix composite materials by infiltration are disclosed. Specifically, an infiltration enhancer precursor is provided to a permeable mass or preform in vapor form, and further, the permeable mass or preform assists in confining the vapor. At least at some point during processing, an infiltrating atmosphere is communicated with the permeable mass or preform. The atmosphere is a particular type of infiltrating atmosphere which is capable of chemically converting the infiltration enhancer precursor to infiltration enhancer. In one embodiment, the vapor phase infiltration enhancer precursor is provided in vacuo or in an inert atmosphere initially, the reactive infiltrating atmosphere being provided only when a desired concentration of infiltration enhancer precursor vapor in the permeable mass or preform has been achieved. In another embodiment, a reactive infiltrating atmosphere is provided concurrently with vapor-phase infiltration enhancer precursor under conditions whereby infiltration enhancer is deposited as a coating layer on one or more surfaces of the permeable mass or preform. A molten matrix metal is able to readily wet and infiltrate such a layer. This infiltrated layer permits more rapid infiltration of the bulk of the preform. The infiltrated layer also provides the formed MMC body with an MMC surface whose properties may be similar to or different from those of the underlying MMC body.
摘要翻译：公开了通过渗透处理金属基质复合材料的改进。具体地说，将渗透增强剂前体提供给蒸气形式的可渗透物质或预制品，并且进一步，可渗透物质或预制品有助于限制蒸气。至少在处理过程中的某一时刻，渗透气氛与可渗透物质或预制品相连通。大气是特定类型的渗透气氛，其能够将渗透增强剂前体化学转化为渗透增强剂。在一个实施方案中，气相渗透增强剂前体首先在真空中或在惰性气氛中提供，反应性渗透气氛仅在达到可渗透物质或预制品中所需浓度的渗透增强剂前体蒸气时才提供。在另一个实施方案中，在渗透增强剂作为涂层沉积在可渗透物质或预制品的一个或多个表面上的条件下，与气相渗透增强剂前体同时提供反应性渗透气氛。熔融的基体金属能够容易地润湿和渗透这样的层。该渗透层允许大部分预制棒更快地渗透。渗透层还为形成的MMC主体提供MMC表面，其性质可能与底层MMC主体的特性相似或不同。

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